chore: don't run sonarCloud analysis for external PRs

Because they will fail due to SonarCloud not supporting running on external PRs anyway.

Author: nytamin

.github/workflows/sonar.yaml

@@ -12,7 +12,7 @@ jobs:
   sonarcloud:
     name: SonarCloud
     runs-on: ubuntu-latest
-    if: ${{ github.repository_owner == 'nrkno' }}
+    if: ${{ github.repository_owner == 'nrkno' && !github.event.pull_request.head.repo.fork }}
 
     steps:
       - uses: actions/checkout@v4