update hard links to master (#23271)

Author: gewarren

docs/core/tools/using-ci-with-cli.md

@@ -120,7 +120,7 @@ Travis CI runs both macOS and Linux jobs in a *build matrix*, where you specify
 
 ### AppVeyor
 
-[AppVeyor](https://www.appveyor.com/) installs the .NET Core 1.0.1 SDK with the `Visual Studio 2017` build worker image. Other build images with different versions of the .NET SDK are available. For more information, see the [appveyor.yml example](https://github.com/dotnet/docs/blob/master/appveyor.yml) and the [Build worker images](https://www.appveyor.com/docs/build-environment/#build-worker-images) article in the AppVeyor docs.
+[AppVeyor](https://www.appveyor.com/) installs the .NET Core 1.0.1 SDK with the `Visual Studio 2017` build worker image. Other build images with different versions of the .NET SDK are available. For more information, see the [appveyor.yml example](https://github.com/dotnet/docs/blob/main/appveyor.yml) and the [Build worker images](https://www.appveyor.com/docs/build-environment/#build-worker-images) article in the AppVeyor docs.
 
 The .NET SDK binaries are downloaded and unzipped in a subdirectory using the install script, and then they're added to the `PATH` environment variable. Add a build matrix to run integration tests with multiple versions of the .NET SDK:
 

docs/fsharp/language-reference/compiler-messages/index.md

@@ -15,7 +15,7 @@ This section details compiler errors and warnings that the F# compiler will emit
 If a particular warning or error is not yet recorded in this section:
 
 - Go to the end of this page and send feedback that includes the number or text of the error, or
-- Add it yourself by following the instructions in [create-new-fsharp-compiler-message.fsx](https://github.com/dotnet/docs/blob/master/docs/fsharp/language-reference/compiler-messages/util/create-new-fsharp-compiler-message.fsx) and opening a pull request for this repository.
+- Add it yourself by following the instructions in [create-new-fsharp-compiler-message.fsx](https://github.com/dotnet/docs/blob/main/docs/fsharp/language-reference/compiler-messages/util/create-new-fsharp-compiler-message.fsx) and opening a pull request for this repository.
 
 ## See also
 

docs/standard/data/sqlite/collation.md

@@ -15,7 +15,7 @@ Collating sequences are used by SQLite when comparing TEXT values to determine o
 
 ## Custom collation
 
-You can also define your own collating sequences or override the built-in ones using <xref:Microsoft.Data.Sqlite.SqliteConnection.CreateCollation%2A>. The following example shows overriding the NOCASE collation to support Unicode characters. The [full sample code](https://github.com/dotnet/docs/blob/master/samples/snippets/standard/data/sqlite/CollationSample/Program.cs) is available on GitHub.
+You can also define your own collating sequences or override the built-in ones using <xref:Microsoft.Data.Sqlite.SqliteConnection.CreateCollation%2A>. The following example shows overriding the NOCASE collation to support Unicode characters. The [full sample code](https://github.com/dotnet/docs/blob/main/samples/snippets/standard/data/sqlite/CollationSample/Program.cs) is available on GitHub.
 
 [!code-csharp[](../../../../samples/snippets/standard/data/sqlite/CollationSample/Program.cs?name=snippet_Collation)]
 

docs/standard/data/sqlite/extensions.md

@@ -7,7 +7,7 @@ description: Learn how to load SQLite extensions.
 
 SQLite supports loading extensions at run time. Extensions include things like additional SQL functions, collations, virtual tables, and more.
 
-.NET Core includes additional logic for locating native libraries in additional places like referenced NuGet packages. Unfortunately, SQLite can't leverage this logic; it calls the platform API directly to load libraries. Because of this, you may need to modify the PATH, LD_LIBRARY_PATH, or DYLD_LIBRARY_PATH environment variables before loading SQLite extensions. There's [a sample](https://github.com/dotnet/docs/blob/master/samples/snippets/standard/data/sqlite/ExtensionsSample/Program.cs) on GitHub that demonstrates finding binaries for the current runtime inside a referenced NuGet package.
+.NET Core includes additional logic for locating native libraries in additional places like referenced NuGet packages. Unfortunately, SQLite can't leverage this logic; it calls the platform API directly to load libraries. Because of this, you may need to modify the PATH, LD_LIBRARY_PATH, or DYLD_LIBRARY_PATH environment variables before loading SQLite extensions. There's [a sample](https://github.com/dotnet/docs/blob/main/samples/snippets/standard/data/sqlite/ExtensionsSample/Program.cs) on GitHub that demonstrates finding binaries for the current runtime inside a referenced NuGet package.
 
 To load an extension, call the <xref:Microsoft.Data.Sqlite.SqliteConnection.LoadExtension%2A> method. Microsoft.Data.Sqlite will ensure that the extension remains loaded even if the connection is closed and reopened.
 

docs/standard/data/sqlite/in-memory-databases.md

@@ -13,7 +13,7 @@ Data Source=:memory:
 
 ## Shareable in-memory databases
 
-In-memory databases can be shared between multiple connections by using `Mode=Memory` and `Cache=Shared` in the connection string. The `Data Source` keyword is used to give the in-memory database a name. Connection strings using the same name will access the same in-memory database. The database persists as long as at least one connection to it remains open. A [sample](https://github.com/dotnet/docs/blob/master/samples/snippets/standard/data/sqlite/InMemorySample/Program.cs) demonstrating this is available on GitHub.
+In-memory databases can be shared between multiple connections by using `Mode=Memory` and `Cache=Shared` in the connection string. The `Data Source` keyword is used to give the in-memory database a name. Connection strings using the same name will access the same in-memory database. The database persists as long as at least one connection to it remains open. A [sample](https://github.com/dotnet/docs/blob/main/samples/snippets/standard/data/sqlite/InMemorySample/Program.cs) demonstrating this is available on GitHub.
 
 ```connectionstring
 Data Source=InMemorySample;Mode=Memory;Cache=Shared

docs/whats-new/index.yml

@@ -39,7 +39,7 @@ landingContent:
   - linkListType: overview
     links:
     - text: .NET docs repository
-      url: https://github.com/dotnet/docs/blob/master/README.md
+      url: https://github.com/dotnet/docs/blob/main/README.md
     - text: Project structure and labels for issues and pull requests
       url: /contribute/dotnet/labels-projects
     - text: .NET Foundation