Bump MSTest.TestFramework from 3.4.0 to 3.4.3 (#235)

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.4.0 to 3.4.3.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.4.0...v3.4.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -16,7 +16,7 @@
     <PackageVersion Include="Microsoft.VisualStudio.Debugger.InteropA" Version="17.5.33428.366" />
     <PackageVersion Include="Microsoft.Windows.CsWin32" Version="0.3.106" />
     <PackageVersion Include="MSTest.TestAdapter" Version="3.4.3" />
-    <PackageVersion Include="MSTest.TestFramework" Version="3.4.0" />
+    <PackageVersion Include="MSTest.TestFramework" Version="3.4.3" />
     <PackageVersion Include="PInvoke.User32" Version="0.7.124" />
     <PackageVersion Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
     <PackageVersion Include="System.Drawing.Common" Version="8.0.6" />