fix: spelling developpers → developers in README

[js713-lab]

Summary

• Replace developpers with developers in README.md

Fixes #2

[github-actions]

Hi! This looks like your first pull request to this repo — welcome. 🎉

A maintainer will take a look soon. While you wait:

• Make sure CI is green (the markdown lint check is informational and won't block your merge).
• Feel free to update the PR with more commits if you spot something — we won't squash until merge.
• If we ask for changes, that's normal — every PR, including ones from senior engineers, gets feedback.

Thanks for contributing.

[js713-lab]

Closing to keep contribution queue focused — thanks for maintaining the project. Happy to reopen later if useful.