Update README.md

Author: devsylva

README.md

@@ -126,9 +126,9 @@ The following endpoints are available in the API:
 
 # Contributing
 
-Contributions to this project are welcome! Go through our [GUIDELINES]()
+Contributions to this project are welcome! Go through our [GUIDELINES](https://github.com/devsylva/TaskFlow-API/blob/main/CONTRIBUTING.md)
 
 
 # License
 
-This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.