Merge pull request #8118 from mjeffin/postres-volume-typo

Update docker-compose.yml.j2

Reviewed-by: https://github.com/apps/softwarefactory-project-zuul

installer/roles/local_docker/templates/docker-compose.yml.j2

@@ -167,7 +167,7 @@ services:
     container_name: awx_postgres
     restart: unless-stopped
     volumes:
-      - {{ postgres_data_dir }}/10/data/:/var/lib/postgresql/data:Z
+      - "{{ postgres_data_dir }}/10/data/:/var/lib/postgresql/data:Z"
     environment:
       POSTGRES_USER: {{ pg_username }}
       POSTGRES_PASSWORD: {{ pg_password }}