Links and Image: Lesson 3 of Interneting is Hard.md

[MysticElven]

Because

The Additional Resources section is better placed within the assignment for better structure. Also, the assignment contained redundant content already covered in what I'm replacing, so it has been removed for clarity.

This PR

• Moves the Additional Resources section inside the assignment.
• Removes a redundant assignment that duplicates existing content.

Issue

Closes #XXXXX

Additional Information

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

[rlmoser99]

Thank you for taking the time to try and streamline this resource. However, I think it is important to include instructions to pay close attention to the different image format types, because this is important and can get lost in the vast about of information on this website.