fixed errors 2

README.md

@@ -64,6 +64,7 @@ The system follows a multi-stage workflow:
 
 The code is organized into several classes and functions:
 
+* **`DocumentRetriever`:** Loads and interacts with the FAISS index, retrieving relevant documents based on a query.
 * **`FaissRetriever`:** Loads and interacts with the FAISS index, retrieving relevant documents based on a query.
 
 * **`DocSummarizerPipeline`:** Summarizes retrieved documents using the Gemini model, generating a concise answer focused on the user's query.  It uses a carefully crafted prompt to ensure the response is structured and informative.
@@ -299,3 +300,4 @@ Rajarshi Roy - [[email protected]](mailto:[email protected])
 This project is licensed under the MIT License. Feel free to modify and distribute it as per the terms of the license.
 
 I hope this README provides you with the necessary information to get started with the road to Generative AI with Google Gemini and Langchain.
+