feat(ci): add concurrency control to cancel in-progress runs

Author: shekohex

.github/workflows/docker-publish.yml

@@ -24,6 +24,10 @@ on:
         required: false
         type: string
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   REGISTRY: ghcr.io
   IMAGE_PREFIX: ghcr.io/${{ github.repository_owner }}/devcontainers