fix port mappings

Author: mchangrh

.github/workflows/test.yaml

@@ -87,7 +87,8 @@ jobs:
       redis:
         container_name: redis-ci
         image: redis:alpine
-        ports: 6379:6379
+        ports:
+          - 6379:6379
         options: >-
           --health-cmd "redis-cli ping"
           --health-interval 10s
@@ -96,7 +97,8 @@ jobs:
       postgres:
         container_name: postgres-ci
         image: postgres:alpine
-        ports: 5432:5432
+        ports:
+          - 5432:5432
         options: >-
           --health-cmd pg_isready
           --health-interval 10s