fix(workflow): add protected-files fallback-to-issue for doc-freshness-check (#473)

* Initial plan

* fix(workflow): add protected-files fallback-to-issue for doc-freshness-check

Agent-Logs-Url: https://github.com/githubnext/ado-aw/sessions/cc4668a8-0e83-4925-b725-1e2425682e39

Co-authored-by: jamesadevine <4742697+jamesadevine@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jamesadevine <4742697+jamesadevine@users.noreply.github.com>

Author: Copilot

.github/workflows/doc-freshness-check.lock.yml

@@ -14,6 +14,7 @@ network:
 safe-outputs:
   create-pull-request:
     max: 1
+    protected-files: fallback-to-issue
     allowed-files:
       - AGENTS.md
       - README.md