Update README.md

Author: Chandra06

README.md

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 <h3 align="center">IONICFIREBASEAPP</h3>
-<a href="https://www.ionicfirebaseapp.com/coupons" rel=no follow><img src="https://res.cloudinary.com/dlx35qw0l/image/upload/v1576219871/Codecanyon/Artboard_2_4.png" alt="christmas sale">
-</a>
 
  <a href="https://www.ionicfirebaseapp.com/products/flutter-mobile-app"> <h3 align="center">DOWNLOAD TODO APP</h3> </a>