Bump MSTest.TestAdapter from 2.2.8 to 2.2.9

Bumps [MSTest.TestAdapter](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.TestAdapter
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/TestProject/TestProject.csproj

@@ -61,7 +61,7 @@
     </PackageReference>
     <PackageReference Include="Microsoft.CodeCoverage" Version="17.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="2.2.8" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.2.9" />
     <PackageReference Include="MSTest.TestFramework" Version="2.2.9" />
     <PackageReference Include="coverlet.collector" Version="3.1.2" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />