docs: update README

Author: lodev09

README.md

@@ -5,7 +5,7 @@
 
 A simple library to read and write image Exif metadata for your React Native Apps. 🏷️
 
-<img alt="@lodev09/react-native-exify" src="preview.gif" width="500" />
+<img alt="@lodev09/react-native-exify" src="preview.gif" width="400" />
 
 ## Features