Update 130-edit-mapping-books-authors.mdx

remove unnecessary step

Author: wjteo

docs/130-edit-mapping-books-authors.mdx

@@ -7,7 +7,6 @@ import Screenshot from "@site/src/components/Screenshot";
 - Select `Embedded documents`
 - Select `authors` as Source table
 - Check `Merge fields into the parent`
-- Rename `id` field to `_id`
 - Check `name` field and uncheck the rest
 - Click `Save and close` 
 - We have embedded `authors` in the `authorBooks` field