updating the app logo

Author: tibbi

README.md

@@ -1,6 +1,6 @@
 # Simple File Manager
 
-<img alt="Logo" src="app/src/main/res/mipmap-xxxhdpi/ic_launcher.png" width="80" />
+<img alt="Logo" src="fastlane/metadata/android/en-US/images/icon.png" width="120" />
 
 Can also be used for browsing root files and SD card content. You can easily rename, copy, move, delete and share anything you wish.