Added link to Knowledge base example documentation

Author: irmabenitezzapata-creator

product_docs/docs/edb-postgres-ai/1.3/ai-factory/pipeline/knowledge_base/example.mdx

@@ -6,6 +6,10 @@ description: Example of using knowledge bases in AI Accelerator.
 
 This is a full end-to-end example of using knowledge bases in EDB Postgres AI - AI Accelerator.
 
+!!!important
+Since the Knowledge Base primitive will be deprecated, EDB recommends migrating to [auto-processing pipelines](/edb-postgres-ai/latest/ai-factory/pipeline/capabilities/auto-processing/).
+!!!
+
 ```sql
 -- Create extension
 DROP EXTENSION aidb CASCADE;
@@ -69,4 +73,3 @@ DELETE FROM test_source_table_ajz72eb WHERE id = 11211;
 -- check embeddings
 SELECT id FROM test_knowledge_base_ajz72eb_vector;
 ```
-