Update README.md

Author: vmanoj1996

README.md

@@ -47,7 +47,7 @@ Open examples/gettingStarted.slx model and click run
 If the installation is successful, you should see a pendulum model running in a separate window and camera stream displayed by Video Viewer block (Computer Vision Toolbox)
 
 ### Blocks
-<img width="250" alt="mjLib" src="https://user-images.githubusercontent.com/8917581/230754094-908a0a52-2c5d-4e8e-bd82-d2dcc553a846.png">
+<img width="400" alt="mjLib" src="https://user-images.githubusercontent.com/8917581/230754094-908a0a52-2c5d-4e8e-bd82-d2dcc553a846.png">
 
 MuJoCo Plant block steps MuJoCo engine, renders visualization window & camera, sets actuator data and outputs sensor readings