review-bot: trigger only on review approvals (#2289)

Moved the review event of review-bot to only be triggered in approvals.

Because we only update the required reviews when someone approves, this
will stop the bot from immediately requesting a new review when someone
comments or request changes as they should have been already notified in
the first batch.

.github/workflows/review-trigger.yml

@@ -13,7 +13,8 @@ on:
 
 jobs:
   trigger-review-bot:
-    if: github.event.pull_request.draft != true
+    # (It is not a draft) && (it is not a review || it is an approving review)
+    if: ${{ github.event.pull_request.draft != true && (github.event_name != 'pull_request_review' || (github.event.review && github.event.review.state == 'APPROVED')) }}
     runs-on: ubuntu-latest
     name: trigger review bot
     steps: