Bump MSTest.TestFramework from 3.4.1 to 3.4.3

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.4.1 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@v3.4.1...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]>

GraphEngine.Tests/GraphEngine.Tests.csproj

@@ -16,7 +16,7 @@
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.4.1" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.4.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.4.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>