Bump MSTest.TestFramework and Verify.MSTest (#203)

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) and [Verify.MSTest](https://github.com/VerifyTests/Verify). These dependencies needed to be updated together.

Updates `MSTest.TestFramework` from 3.7.3 to 3.7.3
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.7.3...v3.7.3)

Updates `Verify.MSTest` from 28.9.0 to 28.10.1
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@28.9.0...28.10.1)

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

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

Author: dependabot[bot]

SourceGenerator/Akade.IndexedSet.InternalSourceGenerator.Tests/Akade.IndexedSet.InternalSourceGenerator.Tests.csproj

@@ -16,7 +16,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageReference Include="Verify.MSTest" Version="28.9.0" />
+    <PackageReference Include="Verify.MSTest" Version="28.10.1" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.5.0" />
   </ItemGroup>