Update mikepenz/action-junit-report action to v6

Author: renovate[bot]

.github/workflows/gradle.yml

@@ -78,7 +78,7 @@ jobs:
 
       - name: "📊 Publish Test Report"
         if: always()
-        uses: mikepenz/action-junit-report@v5
+        uses: mikepenz/action-junit-report@v6
         with:
           check_name: Java CI / Test Report (${{ matrix.java }})
           report_paths: '**/build/test-results/test/TEST-*.xml'