Bump eslint-plugin-astro from 1.1.2 to 1.6.0

Bumps [eslint-plugin-astro](https://github.com/ota-meshi/eslint-plugin-astro) from 1.1.2 to 1.6.0.
- [Release notes](https://github.com/ota-meshi/eslint-plugin-astro/releases)
- [Changelog](https://github.com/ota-meshi/eslint-plugin-astro/blob/main/CHANGELOG.md)
- [Commits](ota-meshi/eslint-plugin-astro@v1.1.2...v1.6.0)

---
updated-dependencies:
- dependency-name: eslint-plugin-astro
  dependency-version: 1.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]