Bump Verify.DiffPlex from 3.1.0 to 3.1.1

Bumps [Verify.DiffPlex](https://github.com/VerifyTests/Verify.DiffPlex) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/VerifyTests/Verify.DiffPlex/releases)
- [Commits](VerifyTests/Verify.DiffPlex@3.1.0...3.1.1)

---
updated-dependencies:
- dependency-name: Verify.DiffPlex
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Directory.Packages.props

@@ -40,7 +40,7 @@
         <PackageVersion Include="Shouldly"
                         Version="4.2.1" />
         <PackageVersion Include="Verify.DiffPlex"
-                        Version="3.1.0" />
+                        Version="3.1.1" />
         <PackageVersion Include="Verify.Xunit"
                         Version="26.6.0" />
         <PackageVersion Include="Vezel.Cathode"