chore: add call out for NONE authorization type in adding custom head…

…ers section (#6886)

src/fragments/lib/graphqlapi/native_common/advanced-workflows/common.mdx

@@ -212,6 +212,12 @@ Combining multiple GraphQL requests on the client-side is different than server-
 
 By default, the API plugin includes appropriate authorization headers on your outgoing requests. However, you may have an advanced use case where you wish to send additional request headers to AppSync.
 
+<Callout>
+
+If your API does not require any authorization or if you would like manipulate the request yourself, please refer to the [Set authorization mode to NONE](/[platform]/build-a-backend/graphqlapi/customize-authz-modes/#none)
+
+</Callout>
+
 import ios8 from '/src/fragments/lib/graphqlapi/ios/advanced-workflows/50_interceptor.mdx';
 
 <Fragments fragments={{ swift: ios8 }} />