Media Queries: Remove link to kevin powell's conquering responsive layout course

[GaneshS288]

Because

This lesson contained a resource that was already mentioned in a previous lesson.

This PR

Removed the link to Kevin Powell's Conquering Responsive Layouts course

Issue

Closes #29287

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

[GaneshS288]

There were some errors in the lesson file that my markdownlint extension didn't highlight and the npm scripts were not working. Later when I got the npm scripts working I ran lint:lesson script and noticed the errors.

I ran the fix:lesson script and pushed another commit.