CI pr-custom-review (#1169)

* CI pr-custom-review

* Fix checks-reviews-api for pr-custom-review

Author: alvicsam

.github/workflows/pr-custom-review.yml

@@ -39,4 +39,4 @@ jobs:
       - name: pr-custom-review
         uses: paritytech/pr-custom-review@master
         with:
-          checks-reviews-api: http://pcr.parity-stg.parity.io/api/v1/check_reviews
+          checks-reviews-api: http://pcr.parity-prod.parity.io/api/v1/check_reviews