Repo README: Improve wording regarding TOP provided solution

[mao-sz]

Because

People are very commonly concerned when they see their exercise solutions differ from the provided solutions. This is primarily from two parts:

• Learners are initially directed straight to the relevant exercise directory and not told to read the repo README (where a note about the provided solution is). This has been addressed in #27055
• The README note on provided solutions, despite saying the provided one isn't the only solution, the rest of the sentence seems to be interpret-able as "if your solution differs, check with the community if it's actually allowed".

This PR

• Improves the wording of the relevant README note to clarify intent (unified wording with javascript-exercises repo)

Issue

Closes #27053

Additional Information

In conjunction with #424 from the css-exercises repo

Pull Request Requirements

• I have thoroughly read and understand The Odin Project Contributing Guide
• The title of this PR follows the location of change: brief description of change format, e.g. 01-flex-center: Update self check
• 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 applicable, I have ensured that the TOP solution files match the Desired Outcome image

[mao-sz]

Wording changes made as per TheOdinProject/javascript-exercises#424 (comment)