chore(deps): bump dependencies

- @astrojs/vercel    ^9.0.0  →    ^9.0.1
- astro             ^5.15.8  →   ^5.15.9
- starlight-blog    ^0.25.0  →   ^0.25.1
- vercel           ^48.10.2  →  ^48.10.3
- vitest             ^4.0.9  →   ^4.0.10

Author: julien-deramond