feat: adding sofia to sloth users.json

[sofisl]

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Make sure to open an issue as a bug/issue before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕

[bcoe]

we should add a linter so that this would be caught automatically (perhaps something like this, but mind tabbing sofisl in a couple more characters so it matches the spacing of tritone; this is the sort of nit I usually try to not make in code review, please forgive me 😆

[sofisl]

no problem! I can make a new PR, it's good practice!

[bcoe]

mind also adding yourself to the Node.js team, the users list under yoshi-nodejs, after the repos.