Bump Verify.Xunit from 24.2.0 to 26.2.0

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 24.2.0 to 26.2.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](https://github.com/VerifyTests/Verify/commits/26.2.0)

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

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

test/Backgrounder.Generators.Tests/Backgrounder.Generators.Tests.csproj

@@ -18,7 +18,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.9.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="Verify.SourceGenerators" Version="2.2.0" />
-    <PackageReference Include="Verify.Xunit" Version="24.2.0" />
+    <PackageReference Include="Verify.Xunit" Version="26.2.0" />
     <PackageReference Include="xunit" Version="2.8.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>