fix: correct push event typo in create-release-pr workflow (pus → push:) (#4449)

Author: matthew-dean

.github/workflows/create-release-pr.yml

@@ -7,7 +7,7 @@ name: Create Release PR
 # master → "chore: release vX.Y.Z" PR targets master
 # alpha → "chore: alpha release vX.Y.Z" PR targets alpha
 on:
-  pus
+  push:
     branches:
       - master
       - alpha