fixed typo

Author: Rene Brandel

src/pages/cli/graphql/authorization-rules.mdx

@@ -212,7 +212,7 @@ By default, `group` authorization leverages Amazon Cognito user pool groups but
 
 **Known limitations for real-time subscriptions when using dynamic group authorization**:
 1. If you authorize based on a single group per record, then subscriptions are only supported if the user is part of 5 or fewer user groups
-2. If you authorize via an array of groups (communities: [String]! example above),
+2. If you authorize via an array of groups (`groups: [String]` example above),
   - subscriptions are only supported if the user is part of 20 or fewer groups
   - you can only authorize 20 or fewer user groups per record