Bump Verify.Xunit from 28.5.0 to 28.6.0

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 28.5.0 to 28.6.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@28.5.0...28.6.0)

---
updated-dependencies:
- dependency-name: Verify.Xunit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

test/AssemblyMetadata.Generators.Tests/AssemblyMetadata.Generators.Tests.csproj

@@ -46,7 +46,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="[4.4.0]" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="MinVer" Version="6.0.0" PrivateAssets="All" />
-    <PackageReference Include="Verify.Xunit" Version="28.5.0" />
+    <PackageReference Include="Verify.Xunit" Version="28.6.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>