Update README.md

Author: HarshAndroid

README.md

@@ -1,7 +1,7 @@
 # MusicPlayer
 <b>Simple and Feature Rich Music Player Application.</b></br>
 Some ScreenShots:</br>
-<img src="https://github.com/HarshAndroid/MusicPlayer/blob/master/music_player_screenshots/screen_1" width=30% height=30%/>
+<img src="https://github.com/HarshAndroid/MusicPlayer/blob/master/music_player_screenshots/screen_1.png" width=30% height=30%/>
 <img src="https://github.com/HarshAndroid/MusicPlayer/blob/master/music_player_screenshots/screen_3.png" width=30% height=30%/>
 <img src="https://github.com/HarshAndroid/MusicPlayer/blob/master/music_player_screenshots/screen_4.png" width=30% height=30%/>
 <img src="https://github.com/HarshAndroid/MusicPlayer/blob/master/music_player_screenshots/screen_6.png" width=30% height=30%/>