Setting Up Git: Restore accidentally deleted lesson content

[MaoShizhong]

Because

28251 added a great note but accidentally deleted a step that was not intended for deletion.

This PR

• Restores a lesson step that was unintentionally deleted

Issue

N/A

Additional Information

Pull Request Requirements

• [x] I have thoroughly read and understand The Odin Project curriculum contributing guide
• [x] The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• [x] The Because section summarizes the reason for this PR
• [x] The This PR section has a bullet point list describing the changes in this PR
• [ ] If this PR addresses an open issue, it is linked in the Issue section
• [x] If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• [x] If any lesson files are included in this PR, they follow the Layout Style Guide

[xandora]

Oops. >_>