Update README.md

Author: brinesoftwares

README.md

@@ -5,6 +5,6 @@ Mobile app for solving 3*3 Rubik's Cube.
 ## Screenshot
 
  <p align="left">
-  <img src="https://github.com/brinesoftwares/Flutter-AI-Rubik-cube-Solver/blob/master/screenshots/ss2.jpgg?raw=true" width="300" >
-  <img src="https://github.com/brinesoftwares/Flutter-AI-Rubik-cube-Solver/blob/master/screenshots/ss1.jpgg?raw=true" width="300" >
+  <img src="https://github.com/brinesoftwares/Flutter-AI-Rubik-cube-Solver/blob/master/screenshots/ss2.jpg?raw=true" width="300" >
+  <img src="https://github.com/brinesoftwares/Flutter-AI-Rubik-cube-Solver/blob/master/screenshots/ss1.jpg?raw=true" width="300" >
 </p>