Update mikepenz/action-junit-report action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -97,7 +97,7 @@ jobs:
           cd ..
           ./gradlew testIdea
       - name: junit result
-        uses: mikepenz/action-junit-report@v5
+        uses: mikepenz/action-junit-report@v6
         if: always() # always run even if the previous step fails
         with:
           check_name: JUnit ${{ matrix.kind }} ${{ matrix.jre }} ${{ matrix.os }}