Temporarily ignore zizmor's adhoc-packages warning

Author: hugovk

.github/workflows/new-bugs-announce-notifier.yml

@@ -18,7 +18,9 @@ jobs:
       - uses: actions/setup-node@v7.0.0
         with:
           node-version: 20
-      - run: npm install mailgun.js form-data
+      # TODO: Replace with a committed lockfile and `npm ci`, or drop npm
+      # and call the Mailgun REST API from the standard library.
+      - run: npm install mailgun.js form-data # zizmor: ignore[adhoc-packages]
       - name: Send notification
         uses: actions/github-script@v9.0.0
         env: