Bump the visual-studio-dependencies group (#255)

Bumps the visual-studio-dependencies group in /visual-studio with 2 updates: Microsoft.VSSDK.BuildTools and [xunit](https://github.com/xunit/xunit).


Updates `Microsoft.VSSDK.BuildTools` from 17.7.2196 to 17.8.2365

Updates `xunit` from 2.6.5 to 2.6.6
- [Commits](xunit/xunit@2.6.5...2.6.6)

---
updated-dependencies:
- dependency-name: Microsoft.VSSDK.BuildTools
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: visual-studio-dependencies
- dependency-name: xunit
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: visual-studio-dependencies
...

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

visual-studio/tests/GitWebLinks.UnitTests/GitWebLinks.UnitTests.csproj

@@ -12,7 +12,7 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
         <PackageReference Include="NSubstitute" Version="5.1.0" />
-        <PackageReference Include="xunit" Version="2.6.5" />
+        <PackageReference Include="xunit" Version="2.6.6" />
         <PackageReference Include="xunit.runner.msbuild" Version="2.6.6">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>