Update mikepenz/action-junit-report action to v6

Author: renovate[bot]

.github/workflows/run_gradle_task.yml

@@ -97,7 +97,7 @@ jobs:
           if-no-files-found: ignore
 
       - name: Publish Test Reports
-        uses: mikepenz/action-junit-report@v5
+        uses: mikepenz/action-junit-report@v6
         if: always()
         with:
           report_paths: |