Fix typo in comment of jquery-bootstrap example

Minor typo in comment. May even make more sense to just remove the number from the comment...
I'm a bit torn. The first two here are the React lifecycle methods so the statement that they are the "only two places we need to integrate" is true. The other two are really just convenience methods and you could make this work without.

But the other 2 methods are also using $ so it's not super clear.

Perhaps clarifying that instead of just changing this to "four" would be best. Want to take what I said and make something like it work in the comment?