minor fix

app/rag.py

@@ -57,7 +57,7 @@ class ChatPDF:
         self.logger.info("initializing the vector store related objects")
         # client = QdrantClient(host="localhost", port=6333)
         client = QdrantClient(":memory:")
-        self.vector_store = QdrantVectorStore(client=client, collection_name="rag_documents")
+        self.vector_store = QdrantVectorStore(client=client, collection_name="rag_documents", enable_hybrid=True)
 
         self.logger.info("initializing the FastEmbedEmbedding")
         self.embed_model = FastEmbedEmbedding(model_name="BAAI/bge-small-en")