fix list style syntax for steps

.woodpecker/build-container.yml

@@ -25,9 +25,9 @@ steps:
       TRIVY_SEVERITY: HIGH,CRITICAL
       TRIVY_TIMEOUT: 1m
 
-  publish-dockerhub:
-    group: container
+  - name: publish-dockerhub
     image: quay.io/thegeeklab/wp-docker-buildx:2
+    group: container
     settings:
       auto_tag: true
       containerfile: Containerfile.multiarch
@@ -46,9 +46,9 @@ steps:
         branch:
           - ${CI_REPO_DEFAULT_BRANCH}
 
-  publish-quay:
-    group: container
+  - name: publish-quay
     image: quay.io/thegeeklab/wp-docker-buildx:2
+    group: container
     settings:
       auto_tag: true
       containerfile: Containerfile.multiarch