Fix link to GitHub Learning Lab course

Updated the link for the Introduction to GitHub Learning Lab course.

Author: folaav

git-guides/git-overview.md

@@ -136,6 +136,6 @@ If you choose not to merge the pull request, you can also close pull requests wi
 
 If you're wondering where Git ends and GitHub begins, you're not alone. They are tied closely together to make working with them both a seamless experience. While Git takes care of the underlying version control, GitHub is the collaboration platform built on top of it. GitHub is the place for pull requests, comments, reviews, integrated tests, and so much more. Most developers work locally to develop and use GitHub for collaboration. That ranges from using GitHub to host the shared remote repository to working with colleagues and capitalizing on features like protected branches, code review, GitHub Actions, and more.
 
-The best place to practice using Git and GitHub is the [Introduction to GitHub Learning Lab course](https://lab.github.com/githubtraining/introduction-to-github).
+The best place to practice using Git and GitHub is the [Introduction to GitHub Learning Lab course](https://learn.github.com/courses/introductiontoGitHub).
 
 If you already know Git and need to sign up for a GitHub account, head over to [github.com](https://github.com/).