fix(comment): fix change made to comment plugin

[andresatierf]

Fix change made during this stream at 1:30:30.

internals was changed to utils

[gnmearacaun]

~ts_contextcommentstring.internals is already in a pcall of the require function and the utils methods made in the commit made onstream. Let me know if you are having unwanted behaviour otherwise I will close this.~

[andresatierf]

It's precisely that commit that this PR is meant to fix. That commit removed the use of ts_context_commentstring.internals used on the return statement of that file and instead used the ts_context_commentstring.utils

[gnmearacaun]

I see what you mean, there was a typo on the stream; calculate_commentstring is part of internals, not utils