infra(mergify): added automatic reviews for github actions is actor

.github/mergify.yml

@@ -1,8 +1,6 @@
 queue_rules:
-  # If you have other queues defined, add this at the end so it is processed last
   - name: dep-update
     batch_size: 10
-    # Wait for up to 30 minutes for the batch to fill up
     batch_max_wait_time: 30 min
     queue_conditions:
       - author = dependabot[bot]
@@ -20,8 +18,15 @@ pull_request_rules:
       - "#approved-reviews-by>=1"
     actions:
       queue:
+  - name: Automatic approve for GitHub Actions pull requests
+    conditions:
+      - author = github-actions[bot]
+    actions:
+      review:
+        type: APPROVE
   - name: Automatic merge for GitHub Actions pull requests
     conditions:
       - author = github-actions[bot]
+      - "#approved-reviews-by>=1"
     actions:
       merge: