Update actions/upload-artifact action to v6

Author: xdev-renovate

.github/workflows/check-build.yml

@@ -145,7 +145,7 @@ jobs:
 
     - name: Upload report
       if: always()
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: pmd-report
         if-no-files-found: ignore