chore(deps): bump the all-docs-site-dependencies group

Bumps the all-docs-site-dependencies group in /docs-site with 4 updates: [@astrojs/check](https://github.com/withastro/astro/tree/HEAD/packages/language-tools/astro-check), [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight), [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) and [astro-mermaid](https://github.com/joesaby/astro-mermaid).


Updates `@astrojs/check` from 0.9.7 to 0.9.8
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/language-tools/astro-check/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/check@0.9.8/packages/language-tools/astro-check)

Updates `@astrojs/starlight` from 0.37.7 to 0.38.1
- [Release notes](https://github.com/withastro/starlight/releases)
- [Changelog](https://github.com/withastro/starlight/blob/main/packages/starlight/CHANGELOG.md)
- [Commits](https://github.com/withastro/starlight/commits/@astrojs/starlight@0.38.1/packages/starlight)

Updates `astro` from 5.18.1 to 6.0.5
- [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@6.0.5/packages/astro)

Updates `astro-mermaid` from 1.1.0 to 1.3.1
- [Release notes](https://github.com/joesaby/astro-mermaid/releases)
- [Commits](joesaby/astro-mermaid@v1.1.0...v1.3.1)

---
updated-dependencies:
- dependency-name: "@astrojs/check"
  dependency-version: 0.9.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-docs-site-dependencies
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.38.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all-docs-site-dependencies
- dependency-name: astro
  dependency-version: 6.0.5
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-docs-site-dependencies
- dependency-name: astro-mermaid
  dependency-version: 1.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all-docs-site-dependencies
...

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Author: dependabot[bot]