Update pkgdeps/automerge-gate action to v5

Update pkgdeps/automerge-gate from v4.1.0 to v5.0.0

Change-type: patch

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@fe5d7cd2fc17778dc42f6916f9d9990cb259ad01 # v5.0.0
         with:
           gate-mode: 'public'