Update README.md

Author: javascriptbear

README.md

@@ -18,6 +18,7 @@ https://user-images.githubusercontent.com/109053279/178185429-8de77574-cc2f-429f
 - 🗑️ Delete todos
 - ⏸ Save todos to Local Storage when the state changes
 - ▶️ Load the todos from Local Storage when the site is loaded again
+- 🌙 Light \ dark mode toggle
 
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   ❤️ Feel free to create issues and contributions for features or bugs to this project.