link CONTRIBUTING.md to README.md (#223)

Author: AHReccese

README.md

@@ -245,6 +245,10 @@ You can also join our discord server
   <img src="https://img.shields.io/discord/1064533716615049236.svg?style=for-the-badge" alt="Discord Channel">
 </a>
 
+## Contributing
+
+We welcome contributions! Please read our **[Contributing Guidelines](.github/CONTRIBUTING.md)** before submitting any changes.
+
 ## Acknowledgments
 
 [Python Software Foundation (PSF)](https://www.python.org/psf/) grants PyMilo library partially for versions **1.0, 1.1**. [PSF](https://www.python.org/psf/) is the organization behind Python. Their mission is to promote, protect, and advance the Python programming language and to support and facilitate the growth of a diverse and international community of Python programmers.