Bump vite and astro in /demo (#70)

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) to 3.2.7 and updates ancestor dependency [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro). These dependencies need to be updated together.


Updates `vite` from 3.1.8 to 3.2.7
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v3.2.7/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v3.2.7/packages/vite)

Updates `astro` from 1.5.2 to 1.9.2
- [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@1.9.2/packages/astro)

---
updated-dependencies:
- dependency-name: vite
  dependency-type: indirect
- dependency-name: astro
  dependency-type: direct:development
...

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