HTML Foundations Update: Clarify GitHub account requirements for publishing private repos

[wizozero]

Because

This PR updates and clarifies the information about GitHub account requirements for publishing web projects. It addresses potentially misleading information in the current content regarding the need for a paid GitHub account.

This PR

• Updates the note about GitHub account requirements in the relevant lesson file
• Clarifies the distinction between free and paid accounts regarding publishing from private repositories
• Ensures the information is accurate and up-to-date with GitHub's current policies

Additional Information

This PR is a revised version of a previously closed PR. It incorporates feedback from maintainers to provide more accurate information about GitHub Pages publishing requirements.

Previous PR

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• 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
• The Because section summarizes the reason for this PR
• 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
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide

[MaoShizhong]

Ignore the lint check fail