Update actions/upload-artifact action to v6

Author: renovate[bot]

.github/workflows/run_gradle_task.yml

@@ -103,7 +103,7 @@ jobs:
 
       - name: Upload build reports
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: build-report-${{ runner.os }}${{ github.action }}
           path: |