chore(deps): bump astro and @astrojs/node

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

Updates `astro` from 4.16.18 to 5.1.1
- [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@5.1.1/packages/astro)

Updates `@astrojs/node` from 8.3.4 to 9.0.0
- [Release notes](https://github.com/withastro/adapters/releases)
- [Changelog](https://github.com/withastro/adapters/blob/main/packages/node/CHANGELOG.md)
- [Commits](https://github.com/withastro/adapters/commits/@astrojs/node@9.0.0/packages/node)

---
updated-dependencies:
- dependency-name: astro
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@astrojs/node"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>