Update README.md

Author: Rumaisas-islam

README.md

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+![Task Manager Banner](banner.png)
 # 📝 Task Manager CLI Application
 
 ![Python](https://img.shields.io/badge/Python-3.10+-blue?style=for-the-badge&logo=python)
@@ -130,4 +131,4 @@ For any major changes, please open an issue first to discuss your ideas.
 
 ## ❤️ Made with Passion by [Rumaisa Islam](https://github.com/Rumaisas-islam)
 
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