Bump Verify.Xunit from 12.0.0 to 12.2.0 in /src

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 12.0.0 to 12.2.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](https://github.com/VerifyTests/Verify/compare/12.0.0...12.2.0)

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

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

src/Tests/Tests.csproj

@@ -7,7 +7,7 @@
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="MarkdownSnippets.MsBuild" Version="24.1.0" PrivateAssets="all" />
-    <PackageReference Include="Verify.Xunit" Version="12.0.0" />
+    <PackageReference Include="Verify.Xunit" Version="12.2.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
     <ProjectReference Include="..\Verify.Quibble\Verify.Quibble.csproj" />
     <PackageReference Include="ProjectDefaults" Version="1.0.58" PrivateAssets="All" />