Chore: keep main and dev CI runs from canceling (#14611)

.github/workflows/ci-docker.yml

@@ -13,7 +13,8 @@ on:
       - main
   workflow_dispatch:
 concurrency:
-  group: docker-${{ github.event.pull_request.number || github.ref }}
+  # Let dev/main commits finish, PR and feature-branch runs supersede older ones
+  group: docker-${{ github.event.pull_request.number || ((github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main') && github.run_id) || github.ref }}
   cancel-in-progress: true
 env:
   REGISTRY: ghcr.io