Update index.md

Author: woshimajintao

docs/index.md

@@ -7,13 +7,13 @@ 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
-
+  - 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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 [Get started →](getting_started.md)