Bump PublicApiGenerator from 11.2.0 to 11.4.0 in /src

Bumps [PublicApiGenerator](https://github.com/PublicApiGenerator/PublicApiGenerator) from 11.2.0 to 11.4.0.
- [Release notes](https://github.com/PublicApiGenerator/PublicApiGenerator/releases)
- [Commits](PublicApiGenerator/PublicApiGenerator@11.2.0...11.4.0)

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

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

Author: dependabot[bot]

src/ServiceBus.Tests/ServiceBus.Tests.csproj

@@ -20,7 +20,7 @@
 
   <ItemGroup>
     <PackageReference Include="Particular.Approvals" Version="1.1.1" />
-    <PackageReference Include="PublicApiGenerator" Version="11.2.0" />
+    <PackageReference Include="PublicApiGenerator" Version="11.4.0" />
   </ItemGroup>
 
 </Project>