Bump MSTest.TestFramework

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.2.3 to 2.2.4.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.2.3...v2.2.4)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/csharp/language-reference/operators/snippets/shared/operators.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MSTest.TestFramework" Version="2.2.3" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.2.4" />
   </ItemGroup>
 
 </Project>