chore(deps): bump DiffEngine from 11.4.1 to 12.2.0 in /src (#276)

Bumps [DiffEngine](https://github.com/VerifyTests/DiffEngine) from 11.4.1 to 12.2.0.
- [Release notes](https://github.com/VerifyTests/DiffEngine/releases)
- [Commits](https://github.com/VerifyTests/DiffEngine/commits/12.2.0)

---
updated-dependencies:
- dependency-name: DiffEngine
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/Directory.build.props

@@ -39,7 +39,7 @@
 		<PackageReference Include="Xunit.SkippableFact" Version="1.4.13" />
 		<PackageReference Include="Xunit.StaFact" Version="1.1.11" />
 		<PackageReference Include="FluentAssertions" Version="6.11.0" />
-		<PackageReference Include="DiffEngine" Version="11.4.1" />
+		<PackageReference Include="DiffEngine" Version="12.2.0" />
 		<PackageReference Include="PublicApiGenerator" Version="11.0.0" />
 		<PackageReference Include="coverlet.msbuild" Version="6.0.0">
 			<PrivateAssets>all</PrivateAssets>