Bump the visual-studio-dependencies group (#267)

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 17.8.2365 to 17.9.3168

Updates `xunit` from 2.6.6 to 2.7.0
- [Commits](xunit/xunit@2.6.6...2.7.0)

---
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-minor
  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/source/GitWebLinks/GitWebLinks.csproj

@@ -229,7 +229,7 @@
     <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.0.31902.203" ExcludeAssets="runtime">
       <IncludeAssets>compile; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="17.8.2365">
+    <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="17.9.3168">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>

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

@@ -12,7 +12,7 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="NSubstitute" Version="5.1.0" />
-        <PackageReference Include="xunit" Version="2.6.6" />
+        <PackageReference Include="xunit" Version="2.7.0" />
         <PackageReference Include="xunit.runner.msbuild" Version="2.7.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>