typos on add-mapping-books-reviews

Author: wenjie-mdb

docs/80-Edit Mapping Rules/50-add-mapping-books-reviews.mdx

@@ -11,8 +11,8 @@ In this step we will embed the book details into the empty array from the join t
 - On the relational mappings list on the right, click `+ Add`
 - Select `Embedded array`
 - Select `reviews` as Source table
-- In the advanced settings, check 'Add array conditions`
-- In `Sort by and order` option, select 'timestamp' and toggle the order to descending
+- In the advanced settings, check `Add array conditions`
+- In `Sort by and order` option, select `timestamp` and toggle the order to descending
 - Set `Limit number of rows` to `3`
 - Uncheck the `bookId` and leave the rest of the fields checked
 - Click `Save and close`