feat:update README.md

README.md

@@ -2,13 +2,14 @@
 
 <p align="center"> a rich text editor by canvas</p>
 
-## snapshot
+## tips
 
-![image](https://github.com/Hufe921/canvas-editor/blob/main/src/assets/snapshots/main_v0.8.8.png)
+1. The official NPM package will be available after the release of version 1.0.0
+2. The export pdf feature is in the poc stage, see [feature/pdf](https://github.com/Hufe921/canvas-editor/tree/feature/pdf)
 
-## tip
+## snapshot
 
-The official NPM package will be available after the release of version 1.0.0
+![image](https://github.com/Hufe921/canvas-editor/blob/main/src/assets/snapshots/main_v0.8.8.png)
 
 ## next features