Bump MSTest.TestFramework from 2.2.3 to 2.2.4

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-preview[bot] <support@dependabot.com>

tests/TurnerSoftware.SitemapTools.Tests/TurnerSoftware.SitemapTools.Tests.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="2.2.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.2.3" />
-    <PackageReference Include="MSTest.TestFramework" Version="2.2.3" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.2.4" />
   </ItemGroup>
 
   <ItemGroup>