fix: Update SonarCloud workflow to use non-deprecated action

- Replace SonarSource/sonarcloud-github-action@master with SonarSource/[email protected]
- This resolves the deprecation warning in CI/CD pipeline

Author: garotm

.github/workflows/sonarcloud.yml

@@ -33,7 +33,7 @@ jobs:
           pytest tests/ --cov=githubauthlib --cov-report=xml --cov-report=term-missing
 
       - name: SonarCloud Scan
-        uses: SonarSource/sonarcloud-github-action@master
+        uses: SonarSource/sonarqube-scan-action@v5.0.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}