Exercise 6 repeat string: Put info about .skip tests in readme

[Jacksonbryan28]

Prerequisites

• I have thoroughly read and understand The Odin Project Contributing Guide
• I have searched the existing issues to ensure this improvement hasn't been suggested before (please have a look through our open issues list to make sure)
• The title of this issue follows the <Location of the improvement>: <Brief description of the improvement> format, e.g. Exercises: Add exercise on XYZ
• (Optional) I am interested in working on this issue and would like to be assigned to it

Improvement Description

In the javascript-exercises file you pick up on lesson 6. In the lesson 7 readme there is the following paragraph -

You will notice in this exercise that there are multiple tests (in the file reverseString.spec.js). Currently, only the first test is enabled. After ensuring that the first test passes, enable the remaining tests one by one by removing the .skip from the test.skip() function.

I suggest moving this into lesson 6 since lesson 6 also has multiple test with .skip applied. I wasn't sure what to do, or why so many tests were being skipped when running npm test for lesson 6.

Acceptance Criteria

• the paragraph explaining .skip and how to use multiple skips is moved from lesson 7 into lesson 6 so it appears when you first encounter it.

(Optional) Additional Comments

No response