Update mikepenz/action-junit-report action to v5 (square#8641)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build.yml

@@ -124,7 +124,7 @@ jobs:
 
       - name: Publish Test Report
         if: github.repository == 'square/okhttp' && github.ref == 'refs/heads/master'
-        uses: mikepenz/action-junit-report@v4
+        uses: mikepenz/action-junit-report@v5
         with:
           report_paths: '**/build/test-results/*/TEST-*.xml'
           check_name: OpenJDK 11 Test Report