Bump Verify.MSTest and MSTest.TestFramework (#150)

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

Updates `Verify.MSTest` from 23.7.2 to 26.0.0
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@23.7.2...26.0.0)

Updates `MSTest.TestFramework` from 3.3.0 to 3.5.0
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.3.0...v3.5.0)

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

@@ -10,13 +10,13 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.4.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.3.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.5.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Verify.DiffPlex" Version="3.0.0" />
-    <PackageReference Include="Verify.MSTest" Version="23.7.2" />
+    <PackageReference Include="Verify.MSTest" Version="26.0.0" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.2.0" />
   </ItemGroup>