[Docs Site] Bump @astrojs/check from 0.9.3 to 0.9.4

Bumps [@astrojs/check](https://github.com/withastro/language-tools/tree/HEAD/packages/astro-check) from 0.9.3 to 0.9.4.
- [Release notes](https://github.com/withastro/language-tools/releases)
- [Changelog](https://github.com/withastro/language-tools/blob/main/packages/astro-check/CHANGELOG.md)
- [Commits](https://github.com/withastro/language-tools/commits/@astrojs/[email protected]/packages/astro-check)

---
updated-dependencies:
- dependency-name: "@astrojs/check"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]