chore(deps): bump MSTest.TestFramework from 3.6.3 to 3.6.4

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.6.3 to 3.6.4.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.6.3...v3.6.4)

---
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]

Directory.Packages.props

@@ -19,7 +19,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="Microsoft.TestPlatform.TestHost" Version="17.12.0" />
     <PackageVersion Include="MSTest.TestAdapter" Version="3.6.3" />
-    <PackageVersion Include="MSTest.TestFramework" Version="3.6.3" />
+    <PackageVersion Include="MSTest.TestFramework" Version="3.6.4" />
     <PackageVersion Include="NUnit" Version="4.2.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.4.0" />