MPT-14206 bump sonar scan to v6 (#38)

Author: ffaraone

.github/workflows/pr-build-merge.yml

@@ -66,7 +66,7 @@ jobs:
         is_merged: ${{ github.event.pull_request.merged }}
 
     - name: SonarQube Scan
-      uses: sonarsource/sonarqube-scan-action@v4
+      uses: sonarsource/sonarqube-scan-action@v6
       env:
         SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}