deps: bump astro in /docs in the astro-minor-patch group (#2208)

Bumps the astro-minor-patch group in /docs with 1 update: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `astro` from 7.3.5 to 7.3.8
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@7.3.8/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 7.3.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: astro-minor-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Tamir Dresher <tamir.dresher@gmail.com>

Author: dependabot[bot]