build(deps): Bump Verify.Xunit and xunit.extensibility.execution

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) and [xunit.extensibility.execution](https://github.com/xunit/xunit). These dependencies needed to be updated together.

Updates `Verify.Xunit` from 22.5.0 to 22.8.0
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](https://github.com/VerifyTests/Verify/commits)

Updates `xunit.extensibility.execution` from 2.5.2 to 2.6.2
- [Commits](xunit/xunit@2.5.2...2.6.2)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tests/bunit.generators.tests/bunit.generators.tests.csproj

@@ -15,7 +15,7 @@
 		<PackageReference Include="System.Net.Http" Version="4.3.4" />
 		<PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
 		<PackageReference Include="Verify.SourceGenerators" Version="2.2.0" />
-		<PackageReference Include="Verify.Xunit" Version="22.5.0" />
+		<PackageReference Include="Verify.Xunit" Version="22.8.0" />
 		<PackageReference Update="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
 		<PackageReference Update="Microsoft.CodeAnalysis.Common" Version="4.8.0" />
 		<PackageReference Update="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.8.0" />