Update gif size

Author: ThomasEcalle

README.md

@@ -7,7 +7,7 @@ Rename Flutter applications in one command.
 ## Usage
 
 <p align="center">
-<img src="https://raw.githubusercontent.com/ThomasEcalle/flutter_rename_app/master/documentation/readme_gif.gif" width="360" height="320"/>
+<img src="https://raw.githubusercontent.com/ThomasEcalle/flutter_rename_app/master/documentation/readme_gif.gif" width="700" height="350"/>
 </p>
 
 ### Add dependency