Update index.md

Author: woshimajintao

docs/index.md

@@ -7,15 +7,14 @@ This tool helps you annotate action spotting datasets in sports video. Use the n
 ![Main GUI Screenshot](assets/localization-UI.png)
 
 **Features:**
-  - Intuitive graphical interface for annotating actions in sports videos
-  - Fast video navigation and frame-accurate annotation
-  - Easily edit timestamps and action labels
-  - Supports OSL JSON annotation format for seamless integration with [OSL-ActionSpotting](https://github.com/OpenSportsLab/OSL-ActionSpotting)
-  - Save and load annotation files
-  - Keyboard shortcuts for power users
-  
 
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+- Intuitive graphical interface for annotating actions in sports videos
+- Fast video navigation and frame-accurate annotation
+- Easily edit timestamps and action labels
+- Supports OSL JSON annotation format for seamless integration with [OSL-ActionSpotting](https://github.com/OpenSportsLab/OSL-ActionSpotting)
+- Save and load annotation files
+- Keyboard shortcuts for power users
+  
 [Get started →](getting_started.md)
 
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