ci: docker: Style improvements

.github/workflows/docker.yml

@@ -9,9 +9,11 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      - name: Check out
+      -
+        name: Check out
         uses: actions/checkout@v2
-      - name: Docker meta
+      -
+        name: Docker meta
         id: meta
         uses: docker/metadata-action@v3
         with:
@@ -21,13 +23,15 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
-      - name: Log in to Docker Hub
+      -
+        name: Log in to Docker Hub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Build and push
+      -
+        name: Build and push
         uses: docker/build-push-action@v2
         with:
           context: .