Bump Verify.Xunit from 28.3.2 to 28.4.0

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) from 28.3.2 to 28.4.0.
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@28.3.2...28.4.0)

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

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

Directory.Packages.props

@@ -50,7 +50,7 @@
         <PackageVersion Include="Verify.DiffPlex"
                         Version="3.1.2" />
         <PackageVersion Include="Verify.Xunit"
-                        Version="28.3.2" />
+                        Version="28.4.0" />
         <PackageVersion Include="Vezel.Cathode"
                         Version="0.14.17" />
         <PackageVersion Include="xunit"