Bump MSTest.TestFramework from 2.2.8 to 2.2.9

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.2.8 to 2.2.9.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.2.8...v2.2.9)

---
updated-dependencies:
- dependency-name: MSTest.TestFramework
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.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="17.1.0" />
 		<PackageReference Include="MSTest.TestAdapter" Version="2.2.9" />
-		<PackageReference Include="MSTest.TestFramework" Version="2.2.8" />
+		<PackageReference Include="MSTest.TestFramework" Version="2.2.9" />
 		<PackageReference Include="coverlet.collector" Version="3.1.2">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>