Add notes about new schemebuilder patterns in provider migration doc

Signed-off-by: Furkat Gofurov <furkat.gofurov@suse.com>

docs/book/src/developer/providers/migrations/v1.5-to-v1.6.md

@@ -31,3 +31,4 @@ maintainers of providers and consumers of our Go API.
 
 ### Suggested changes for providers
 
+- In order to reduce dependencies for API package consumers, CAPI has diverged from the default kubebuilder scheme builder. This new pattern may also be useful for reducing dependencies in provider API packages. For more information [see the implementers guide.](../implementers-guide/create_api.md#registering-apis-in-the-scheme)