Fixed broken link

Author: Tahanima

README.md

@@ -6,7 +6,7 @@ Welcome to the *LeetCode Solution Curation* repository! 👋
 *The contents of this repository will get published [here](https://tahanima.github.io/hello-leetcode/)*. So, don't forget to check it out.
 
 ## Contributing
-Want to contribute? Please read our [CONTRIBUTING](.CONTRIBUTING.md) guidelines.
+Want to contribute? Please read our [CONTRIBUTING](./CONTRIBUTING.md) guidelines.
 
 ## License
 <a rel="license" href="https://opensource.org/licenses/MIT"><img alt="MIT License" style="border-width:0" height="50" src="https://w7.pngwing.com/pngs/514/841/png-transparent-mit-license-bsd-licence-open-source-license-copyright-miscellaneous-text-logo.png" /></a><br />This work is licensed under the <a rel="license" href="https://opensource.org/licenses/MIT">MIT License</a>.