Add GitHub profile link to README

Author: timothywarner

README.md

@@ -9,6 +9,7 @@
 ## 📫 Contact Information
 
 - **Name:** Tim Warner
+- **GitHub:** [@timothywarner](https://github.com/timothywarner)
 - **Email:** [[email protected]](mailto:[email protected])
 - **LinkedIn:** [Timothy Warner](https://www.linkedin.com/in/timothywarner/)
 - **YouTube:** [Tech Trainer Tim](https://www.youtube.com/channel/UCim7PFtynyPuzMHtbNyYOXA)