Fix pgvector docker command (#187)

Co-authored-by: Yash Pratap Solanky <[email protected]>

Author: willemcdejongh

agents/knowledge.mdx

@@ -68,7 +68,7 @@ docker run -d \
   -v pgvolume:/var/lib/postgresql/data \
   -p 5532:5432 \
   --name pgvector \
-  agno/pgvector:16
+  agnohq/pgvector:16
 ```
 
 ### Step 2: Traditional RAG