chore(deps): bump astro and @astrojs/vue in /docs (#47)

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

Updates `astro` from 5.16.11 to 6.3.1
- [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@6.3.1/packages/astro)

Updates `@astrojs/vue` from 5.1.4 to 6.0.1
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/vue/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/vue@6.0.1/packages/integrations/vue)

---
updated-dependencies:
- dependency-name: "@astrojs/vue"
  dependency-version: 6.0.1
  dependency-type: direct:production
- dependency-name: astro
  dependency-version: 6.3.1
  dependency-type: direct:production
...

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