Add concurrency limit to ci-docker (#4407)

.github/workflows/ci-docker.yml

@@ -23,6 +23,11 @@ permissions:
   contents: read
   packages: read
 
+concurrency:
+  # yamllint disable-line rule:line-length
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   check-docker:
     name: Build docker containers