Bump Verify.DiffPlex from 2.2.1 to 2.3.0 in /eng/dependabot

Bumps [Verify.DiffPlex](https://github.com/VerifyTests/Verify.DiffPlex) from 2.2.1 to 2.3.0.
- [Release notes](https://github.com/VerifyTests/Verify.DiffPlex/releases)
- [Commits](VerifyTests/Verify.DiffPlex@2.2.1...2.3.0)

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

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

eng/dependabot/Packages.props

@@ -27,6 +27,6 @@
     <PackageReference Update="xunit.abstractions" Version="2.0.3" />
     <PackageReference Update="Newtonsoft.Json.Schema" Version="3.0.15" />
     <PackageReference Update="Verify.XUnit" Version="22.1.4" />
-    <PackageReference Update="Verify.DiffPlex" Version="2.2.1" />
+    <PackageReference Update="Verify.DiffPlex" Version="2.3.0" />
   </ItemGroup>
 </Project>