Document the parameters computeOverzoomCoords actually takes

[darkdi]

The six names are still there as locals right below, const {x: sx, y: sy, z: sz} = source, so the block reads fine until you line it up against the signature. Looks like it predates source and dest being grouped into objects.

[github-actions]

Hey, @darkdi 👋 Thanks for your contribution to Mapbox GL JS!

Important: This repository does not accept direct merges. All changes go through our internal review process.

What happens next:

1. A team member will review your PR here first
2. If it looks good, they will import it to our internal repository for further review
3. If approved, changes will be synced back here via our release process

Please respond to any review comments on this PR. For more details, see CONTRIBUTING.md.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

darkdi seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}