update demo to Android SDK v4.13.1

neil.li · neil.li · commit 888ae23dd90e · 2020-08-24T15:11:10.000+08:00
diff --git a/README.md b/README.md
@@ -8,7 +8,7 @@ This sample code demonstrates how to use [FFmpeg](https://ffmpeg.org) for video
 
  - Android Studio 2.0+
  - Android System 4.2+
- - DJI Android SDK 4.13.1.1
+ - DJI Android SDK 4.13.1
 
 ## IMPORTANT: Install `git lfs`
 
