deps: Update Microsoft.Extensions.Configuration to version 7

Updates-dependency: Microsoft.Extensions.Configuration
Updates-dependency-from-version: 6.0.0
Updates-dependency-to-version: 7.0.0

Author: renovate[bot]

src/MdDocs.Common/Grynwald.MdDocs.Common.csproj

@@ -14,9 +14,9 @@
     <PackageReference Include="Grynwald.MarkdownGenerator" Version="2.5.34" />
     <PackageReference Include="Mono.Cecil" Version="0.11.4" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="6.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="6.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="6.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.3" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />
   </ItemGroup>