Skills (nitro & update-deps) could be improved

[popey]

Hullo 👋

I ran your skills through tessl skill review at work and found some targeted improvements to the nitro and update-deps skills.

Both could do with improvements to the front-matter and main content.

I'll prep a pull request which updates both skills to improve their activation and effectiveness.

Honest disclosure — I work at @tesslio where we build tooling around skills like these. Not a pitch - just saw room for improvement and wanted to contribute.

Thanks in advance 🙏