Bump Verify.Xunit from 28.2.1 to 28.3.1 in the xunit group (#2908)

Bumps the xunit group with 1 update: [Verify.Xunit](https://github.com/VerifyTests/Verify).


Updates `Verify.Xunit` from 28.2.1 to 28.3.1
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@28.2.1...28.3.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -55,7 +55,7 @@
     <PackageVersion Include="System.IdentityModel.Tokens.Jwt" Version="8.2.0" />
     <PackageVersion Include="System.Private.Uri" Version="4.3.2" />
     <PackageVersion Include="System.Text.Json" Version="9.0.0" />
-    <PackageVersion Include="Verify.Xunit" Version="28.2.1" />
+    <PackageVersion Include="Verify.Xunit" Version="28.3.1" />
     <PackageVersion Include="xRetry" Version="1.9.0" />
     <PackageVersion Include="xunit" Version="2.9.2" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />