[chore] update dependencies - README.md

Author: CuriousGu

README.md

@@ -1,6 +1,6 @@
 ![Python](https://img.shields.io/badge/Python-3776AB?style=for-the-badge&logo=python&logoColor=white)
 ![Docker](https://img.shields.io/badge/Docker-2496ED?style=for-the-badge&logo=docker&logoColor=white)
-![MongoDB](https://img.shields.io/badge/MongoDB-4EA94B?style=for-the-badge&logo=mongodb&logoColor=white
+![MongoDB](https://img.shields.io/badge/MongoDB-4EA94B?style=for-the-badge&logo=mongodb&logoColor=white)
 ![LangChain](https://img.shields.io/badge/LangChain-FF9900?style=for-the-badge&logo=LangChain&logoColor=white)
 ![FastAPI](https://img.shields.io/badge/FastAPI-009688?style=for-the-badge&logo=fastapi&logoColor=white)
 ![LangGraph](https://img.shields.io/badge/LangGraph-007ACC?style=for-the-badge&logo=langgraph&logoColor=white)