fix: remove firewall from flock-action network config

Author: zircote

.github/workflows/flock-action.lock.yml

@@ -35,7 +35,6 @@ network:
     - defaults
     - containers
     - "nsip.org"
-  firewall: true
 source: zircote/gh-agentic-workflows/workflows/flock-action.md@b502dbd3372733ad0155cb70cfb64afd07fae89e
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