Fix spelling

Author: rohitaryal

README.md

@@ -202,5 +202,5 @@ Create an issue [here](https://github.com/rohitaryal/imageFX-api/issues). Make s
 ## Contributions
 Contribution are welcome but ensure to pass all test cases and follow existing coding standard.
 
-## Desclaimer
+## Disclaimer
 This project demonstrates usage of Google's private API but is not affiliated with Google. Use at your own risk.