fix: allow validate-agentic-workflows-pr.yml in forbidden file checks

Author: brunoborges

.github/workflows/validate-agentic-workflows-pr.yml

@@ -33,7 +33,8 @@ jobs:
             '.github/*' \
             '.github/**' \
             | grep -v '^\.github/aw/actions-lock\.json$' \
-            | grep -v '^\.github/workflows/validate-agentic-workflows-pr\.yml$')
+            | grep -v '^\.github/workflows/validate-agentic-workflows-pr\.yml$' \
+            || true)
 
           if [ -n "$forbidden" ]; then
             echo "❌ Forbidden files detected:"