Update README.md

Author: phpipam

README.md

@@ -30,10 +30,10 @@ The can be easily extended to any other custom notification type.
 ## screenshots
 
 Some sample UI screenshots can be found below:
-!(/css/screenshots/Screen1.png?raw=true "Screen1")
-!(/css/screenshots/Screen2.png?raw=true "Screen2")
-!(/css/screenshots/Screen3.png?raw=true "Screen3")
-!(/css/screenshots/Screen4.png?raw=true "Screen4")
+![Screen1](/css/screenshots/Screen1.png?raw=true "Screen1")
+![Screen2](/css/screenshots/Screen2.png?raw=true "Screen2")
+![Screen3](/css/screenshots/Screen3.png?raw=true "Screen3")
+![Screen4](/css/screenshots/Screen4.png?raw=true "Screen4")
 
 
 ## setup