(fix): fixed contributing link

Author: vrushank

README.md

@@ -43,7 +43,7 @@ This project uses gulp tool to build CSS, JS and HTML files. Following table exp
 
 If you find something which doesn't make sense, or something doesn't seem right, please make a pull request and please add valid and well-reasoned explanations about your changes or comments.
 
-Before adding a pull request, please see the **[contributing guidelines](.github/CONTRIBUTING.md)**. You should also remember about this:
+Before adding a pull request, please see the **[contributing guidelines](CONTRIBUTING.md)**. You should also remember about this:
 
 All **suggestions/PR** are welcome!