refactor: Update embedding model settings page references in locale files

src/assets/locale/en/knowledge.json

@@ -38,5 +38,5 @@
         "submit": "Submit",
         "success": "Knowledge added successfully"
     },
-    "noEmbeddingModel": "Please add an embedding model first from the Ollama settings page"
+    "noEmbeddingModel": "Please add an embedding model from the RAG settings page first"
 }