typo

ERROR: The Compose file './docker-compose.yml' is invalid because:
services.pywb.volumes contains an invalid type, it should be an array

docker-compose.yml

@@ -87,5 +87,5 @@ services:
     #     ports:
     #         - 8080:8080
     #     volumes:
-    #         ./data:/archivebox
-    #         ./data/wayback:/webarchive
+    #         - ./data:/archivebox
+    #         - ./data/wayback:/webarchive