Update readme

README.md

@@ -9,7 +9,7 @@ GraphQL Authentication adds a JWT authentication layer to your Craft CMS GraphQL
 - Adds ability to define per-section user restrictions (queries and mutations can be limited to author-only) (see [User Settings](https://graphql-authentication.jamesedmonston.co.uk/settings/users))
 - Checks mutation fields against schema permissions, and prevents fields being saved if user is trying to access private entries/assets
 - Adds ability to assign unique GraphQL schemas for each user group
-- Adds ability to restrict user queries/mutations to Craft multi-site sites
+- Adds ability to restrict user queries and mutations to Craft multi-site sites
 - Adds a unique, per-user GraphQL query cache
 
 ## Documentation