build(deps): Bump MSTest.TestFramework from 3.8.2 to 3.8.3

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.8.2 to 3.8.3.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.8.2...v3.8.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Xdg.Testing/Xdg.Testing.csproj

@@ -14,7 +14,7 @@
 	<ItemGroup>
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
 		<PackageReference Include="MSTest.TestAdapter" Version="3.8.2" />
-		<PackageReference Include="MSTest.TestFramework" Version="3.8.2" />
+		<PackageReference Include="MSTest.TestFramework" Version="3.8.3" />
 		<PackageReference Include="coverlet.collector" Version="6.0.4" />
 	</ItemGroup>