Bump the keystatic group across 1 directory with 2 updates

Bumps the keystatic group with 2 updates in the / directory: [@keystatic/astro](https://github.com/Thinkmill/keystatic/tree/HEAD/packages/astro) and [@keystatic/core](https://github.com/Thinkmill/keystatic/tree/HEAD/packages/keystatic).


Updates `@keystatic/astro` from 5.2.0 to 6.0.0
- [Changelog](https://github.com/Thinkmill/keystatic/blob/main/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/Thinkmill/keystatic/commits/HEAD/packages/astro)

Updates `@keystatic/core` from 0.5.51 to 0.6.7
- [Changelog](https://github.com/Thinkmill/keystatic/blob/main/packages/keystatic/CHANGELOG.md)
- [Commits](https://github.com/Thinkmill/keystatic/commits/HEAD/packages/keystatic)

---
updated-dependencies:
- dependency-name: "@keystatic/astro"
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: keystatic
- dependency-name: "@keystatic/core"
  dependency-version: 0.6.7
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: keystatic
...

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Author: dependabot[bot]