updating app screenshots

Author: tibbi

README.md

@@ -14,9 +14,9 @@ This app is just one piece of a bigger series of apps. You can find the rest of
 <a href='https://f-droid.org/packages/com.simplemobiletools.filemanager.pro'><img src='https://simplemobiletools.com/assets/images/f-droid.png' alt='Get it on F-Droid' height='45' /></a>
 
 <div style="display:flex;">
-<img alt="App image" src="fastlane/metadata/android/en-US/images/phoneScreenshots/app.png" width="30%">
+<img alt="App image" src="fastlane/metadata/android/en-US/images/phoneScreenshots/app_1.jpg" width="30%">
 <img alt="App image" src="fastlane/metadata/android/en-US/images/phoneScreenshots/app_2.jpg" width="30%">
-<img alt="App image" src="fastlane/metadata/android/en-US/images/phoneScreenshots/app_3.png" width="30%">
+<img alt="App image" src="fastlane/metadata/android/en-US/images/phoneScreenshots/app_3.jpg" width="30%">
 </div>
 
 License