Revert "Add all recommended triggers to automerge action"

This reverts commit 5f353f6320.

.github/workflows/automerge.yml

@@ -1,23 +1,11 @@
 name: Automerge
 
 on:
+  workflow_run:
+    workflows: ["CI"]
+    types: [completed]
   pull_request:
-    types:
-      - labeled
-      - unlabeled
-      - synchronize
-      - opened
-      - edited
-      - ready_for_review
-      - reopened
-      - unlocked
-  pull_request_review:
-    types:
-      - submitted
-  check_suite:
-    types:
-      - completed
-  status: {}
+    types: [labeled]
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
@@ -26,7 +14,9 @@ jobs:
   automerge:
     name: Automerge PR
     runs-on: ubuntu-latest
-    if: true
+    if: >
+      github.event_name == 'pull_request' ||
+      (github.event_name == 'workflow_run' && github.event.workflow_run.conclusion == 'success')
     permissions:
       contents: write
       pull-requests: write