Update format.yml (#13451)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/workflows/format.yml

@@ -7,7 +7,7 @@ name: Ultralytics Actions
 on:
   issues:
     types: [opened]
-  pull_request_target:
+  pull_request:
     branches: [main, master]
     types: [opened, closed, synchronize, review_requested]