chore(deps): bump dependencies

- @astrojs/starlight  ^0.35.1  →  ^0.35.2
- @astrojs/vercel      ^8.2.2  →   ^8.2.3
- astro               ^5.12.0  →  ^5.12.5
- vercel              ^44.5.0  →  ^44.6.4

Author: julien-deramond