chore(deps): bump astro, @astrojs/starlight and @astrojs/tailwind

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro), [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight) and [@astrojs/tailwind](https://github.com/withastro/astro/tree/HEAD/packages/integrations/tailwind). These dependencies needed to be updated together.

Updates `astro` from 4.16.18 to 5.17.0
- [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@5.17.0/packages/astro)

Updates `@astrojs/starlight` from 0.21.5 to 0.37.4
- [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@0.37.4/packages/starlight)

Updates `@astrojs/tailwind` from 5.1.0 to 5.1.5
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/tailwind/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/tailwind@5.1.5/packages/integrations/tailwind)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.17.0
  dependency-type: direct:production
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.37.4
  dependency-type: direct:production
- dependency-name: "@astrojs/tailwind"
  dependency-version: 5.1.5
  dependency-type: direct:production
...

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Author: dependabot[bot]