docs: add graphql dependency to payload guide (#13440)

www/apps/book/public/llms-full.txt

@@ -80270,7 +80270,7 @@ In this step, you'll set up Payload in the Next.js Starter Storefront. This requ
 In the directory of the Next.js Starter Storefront, run the following command to install the necessary dependencies:
 
 ```bash npm2yarn badgeLabel="Storefront" badgeColor="blue"
-npm install payload @payloadcms/next @payloadcms/richtext-lexical sharp @payloadcms/db-postgres
+npm install payload @payloadcms/next @payloadcms/richtext-lexical sharp @payloadcms/db-postgres graphql
 ```
 
 ### b. Add Resolution for `undici`