docs: fix broken learning lab link, point to GitHub Skills

Author: Mukundanks

git-guides/git-overview.md

@@ -82,13 +82,13 @@ Some of the most important and most used commands that you'll find there are:
 - `git log`: Browse and inspect the evolution of project files.
 - `git remote -v`: Show the associated remote repositories and their stored name, like `origin`.
 
-If you're looking for more GitHub-specific technical guidance, check out [GitHub's help documentation](https://help.github.com/) or our [GitHub for Developers series](https://www.youtube.com/watch?v=H6wTAIlOUBQ&list=PLg7s6cbtAD16Pgp6WIVfX4VsGI-xyWkMz) on YouTube.
+If you're looking for more GitHub-specific technical guidance, check out [GitHub's help documentation](https://docs.github.com/en) or our [GitHub for Beginners series](https://www.youtube.com/playlist?list=PL0lo9MOBetEFcp4SCWinBdpml9B2U25-f) on YouTube.
 
 ### Getting Started With the Git Workflow
 
 Depending on your operating system, you may already have [Git installed](/git-guides/install-git). But, getting started means more than having the software! To get started, it's important to know the basics of how Git works. You may choose to do the actual work within a terminal, an app like GitHub Desktop, or through GitHub.com. (*Note: while you can interact with Git through GitHub.com, your experience may be limited. Many local tools can give you access to the most widely used Git functionalities, though only the terminal will give you access to them all.*)
 
-There are _many_ ways to use Git, which doesn't necessarily make it easier! But, the fundamental Git workflow has a few main steps. You can practice all of these in the [Introduction to GitHub Learning Lab course](https://lab.github.com/githubtraining/introduction-to-github).
+There are _many_ ways to use Git, which doesn't necessarily make it easier! But, the fundamental Git workflow has a few main steps. You can practice all of these in the [Introduction to GitHub Learning Lab course](https://learn.github.com/skills).
 
 #### Create a branch
 
@@ -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 course](https://learn.github.com/skills).
 
 If you already know Git and need to sign up for a GitHub account, head over to [github.com](https://github.com/).