Fix init permissions for older mongo versions

Author: thespad

readme-vars.yml

@@ -68,7 +68,8 @@ app_setup_block: |
   If you are using the [official mongodb container](https://hub.docker.com/_/mongo/), you can create your user using an `init-mongo.js` file with the following contents:
 
   ```js
-  db.getSiblingDB("MONGO_DBNAME").createUser({user: "MONGO_USER", pwd: "MONGO_PASS", roles: [{role: "dbOwner", db: "MONGO_DBNAME"}, {role: "dbOwner", db: "MONGO_DBNAME_stat"}]});
+  db.getSiblingDB("MONGO_DBNAME").createUser({user: "MONGO_USER", pwd: "MONGO_PASS", roles: [{role: "dbOwner", db: "MONGO_DBNAME"}]});
+  db.getSiblingDB("MONGO_DBNAME_stat").createUser({user: "MONGO_USER", pwd: "MONGO_PASS", roles: [{role: "dbOwner", db: "MONGO_DBNAME_stat"}]});
   ```
 
   Being sure to replace the placeholders with the same values you supplied to the Unifi container, and mount it into your *mongodb* container.