Add protected-files: allowed to evergreen push-to-pull-request-branch safe output

Agent-Logs-Url: https://github.com/githubnext/tsessebe/sessions/a0cf78dd-3ada-482b-8cc7-91bb3b9c65ee

Co-authored-by: mrjf <180956+mrjf@users.noreply.github.com>

Author: Copilot

.github/workflows/evergreen.lock.yml

@@ -26,6 +26,7 @@ safe-outputs:
   push-to-pull-request-branch:
     target: "*"
     max: 3
+    protected-files: allowed
   add-comment:
     max: 3
     target: "*"