fix(self-zizmor): trigger on ready-for-review

If this is used as part of a release-please enabled repository, then
this additional pull_request event type is needed to trigger zizmor on
the release pull request.

Author: zerok

.github/workflows/self-zizmor.yaml

@@ -4,6 +4,11 @@ on:
     paths:
       - ".github/**"
   pull_request:
+    types:
+      - edited
+      - opened
+      - ready_for_review
+      - synchronize
     paths:
       - ".github/**"
   merge_group: