Bump PublicApiGenerator from 11.3.0 to 11.4.0

Bumps [PublicApiGenerator](https://github.com/PublicApiGenerator/PublicApiGenerator) from 11.3.0 to 11.4.0.
- [Release notes](https://github.com/PublicApiGenerator/PublicApiGenerator/releases)
- [Commits](PublicApiGenerator/PublicApiGenerator@11.3.0...11.4.0)

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

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

Author: dependabot[bot]

Tests/Approval.Tests/Approval.Tests.csproj

@@ -12,7 +12,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="PublicApiGenerator" Version="11.3.0" />
+    <PackageReference Include="PublicApiGenerator" Version="11.4.0" />
     <PackageReference Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageReference Include="Verify.Xunit" Version="28.9.0" />
   </ItemGroup>