Added a brief note regarding function hoisting

[RichardJamesC]

Checklist:

• [ x] I have read freeCodeCamp's contribution guidelines.
• [ x] My pull request has a descriptive title (not a vague title like Update index.md)
• [ x] My pull request targets the master branch of freeCodeCamp.
• [ x] All the files I changed are in the same world language, for example: only English changes, or only Chinese changes, etc.

Closes #XXXXX

[gitpod-io]

[tinktink1]

I really liked your idea about adding a brief note and I am sure it will help clear up some confusion. I have read your changes and as far as I can tell the grammar seems to be good. Good work!

[naomi-lgbt]

While this is good information, the concern is that we do not want the challenge instructions to become "walls of text". As this information does not directly apply to the challenge itself, can you walk me through why you feel it is essential to add this to the instructions? 🙂

[RandellDawson]

Since the extra information does not help in solving the problem presented in the instructions, it is just extra information. I am going to close this PR for now.

@RichardJamesC If you can reply back with how this addition allows the user to pass the challenge, then we could consider reopening the PR.

Thank you.