Restrict SonarQube scan to PRs from same repository

Author: EmilianoSanchez

.github/workflows/sonar-scan.yml

@@ -49,7 +49,7 @@ jobs:
             -Dsonar.links.scm="https://github.com/splitio/${{ github.event.repository.name }}"
 
       - name: SonarQube Scan (Pull Request)
-        if: github.event_name == 'pull_request'
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
         uses: SonarSource/sonarqube-scan-action@v6
         env:
           SONAR_TOKEN: ${{ secrets.SONARQUBE_TOKEN }}