Fix confusing comment re: function casing.

In the JS readme, there is a confusing comment in the example describing how to name functions – seeming to indicate as an aside that variables should be snake_case, which isn’t right.

Status: **Ready to merge**

Reviewers: @jansepar 
Ticket: Fixes #1 
Linked PRs: N/A

## Changes
- Changes the comment to reflect what is wrong with the bad example in question.