Bump Verify.DiffPlex and Verify in /src

Bumps [Verify.DiffPlex](https://github.com/VerifyTests/Verify.DiffPlex) and [Verify](https://github.com/VerifyTests/Verify). These dependencies needed to be updated together.

Updates `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)

Updates `Verify` from 27.0.0-beta.6 to 27.0.0-beta.7
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](https://github.com/VerifyTests/Verify/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -10,8 +10,8 @@
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.139" />
     <PackageVersion Include="SixLabors.ImageSharp" Version="3.1.5" />
-    <PackageVersion Include="Verify" Version="27.0.0-beta.6" />
-    <PackageVersion Include="Verify.DiffPlex" Version="3.1.0" />
+    <PackageVersion Include="Verify" Version="27.0.0-beta.7" />
+    <PackageVersion Include="Verify.DiffPlex" Version="3.1.1" />
     <PackageVersion Include="Verify.Nunit" Version="27.0.0-beta.6" />
   </ItemGroup>
 </Project>