Testing JavaScript: Necessary changes in testing module of javascript

[AnkitAdhikari]

Because

This resolves the problem of not getting to follow along the previous video of assignment 1 from funfunfunction which API has turned out to be paid and this provides new assignment video to follow. Also made some indentation fixes in last paragraph of More Testing's assignment and removes the irrelevant last sentence of 2nd assignment of Testing Basics.

This PR

• Replace video of 1st assignment in More Testing
• Adds extra 1 space to maintain 3 spaces indentation (previously was 2 spaces) on 5th assignment step of More Testing.
• Removes 2nd assignment last paragraph.

Issue

Closes #28379

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

[MaoShizhong]

Much appreciated!