Update Pin pkgdeps/automerge-gate action to 1b731ae

Update pkgdeps/automerge-gate
Changelog-entry: Update pkgdeps/automerge-gate

Author: balena-renovate[bot]

.github/workflows/automerge-gate.yml

@@ -18,6 +18,6 @@ jobs:
       pull-requests: read
       actions: read
     steps:
-      - uses: pkgdeps/automerge-gate@v4.1.0
+      - uses: pkgdeps/automerge-gate@1b731ae7137b3b0c37c09bd40df73b2a34a5abaa # v4.1.0
         with:
           gate-mode: 'public'