Recursive Methods: update assignment #1's instructions

[thereisnodeveloper]

Because

• It's too early for reader to attempt some of these exercises
• There are redundant exercises further down the curriculum that ARE required, AND come after reader has gained sufficient knowledge to tackle them

This PR

• Makes it clear reader doesn't have to do the tasks in Assignment 1

Issue

Closes #28790

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]

You don't need to manually line break here. Each line should contain a whole paragraph (or list item in this case).

Suggested change

	1. Read this [intro to recursion](https://javascript.info/recursion). You do
	*not* need to complete the exercises at the end of the article.
	1. Read this [intro to recursion](https://javascript.info/recursion). You do *not* need to complete the exercises at the end of the article.