Merge pull request #555 from creative-commoners/pulls/5.2/graphql

DOC Remove recommendation for GraphQL

en/02_Developer_Guides/19_GraphQL/index.md

@@ -1,8 +1,11 @@
 # Silverstripe CMS GraphQL server
 
-GraphQL is the content API layer for Silverstripe CMS. It is the
-recommended way of getting data in and out of the content management
-system.
+GraphQL can be used as a content API layer for Silverstripe CMS to get data in and out of the content management system.
+
+> [!CAUTION]
+> GraphQL is being removed from the admin section in CMS 6.0, so any customisations made
+> to the `admin` schema will no longer work.
+> GraphQL will still be available as an optional module in CMS 6.0 and still be used to create frontend schemas i.e. the `default` schema.
 
 For more information on GraphQL in general, visit its [documentation site](https://graphql.org).