Bump the npm group across 1 directory with 4 updates

Bumps the npm group with 4 updates in the / directory: [@astrojs/sitemap](https://github.com/withastro/astro/tree/HEAD/packages/integrations/sitemap), [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro), [eslint-plugin-astro](https://github.com/ota-meshi/eslint-plugin-astro) and [prettier-plugin-astro](https://github.com/withastro/prettier-plugin-astro).


Updates `@astrojs/sitemap` from 3.1.4 to 3.1.5
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/sitemap/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/[email protected]/packages/integrations/sitemap)

Updates `astro` from 4.7.1 to 4.9.1
- [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/[email protected]/packages/astro)

Updates `eslint-plugin-astro` from 1.1.2 to 1.2.0
- [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...v1.2.0)

Updates `prettier-plugin-astro` from 0.13.0 to 0.14.0
- [Release notes](https://github.com/withastro/prettier-plugin-astro/releases)
- [Changelog](https://github.com/withastro/prettier-plugin-astro/blob/main/CHANGELOG.md)
- [Commits](withastro/prettier-plugin-astro@v0.13.0...v0.14.0)

---
updated-dependencies:
- dependency-name: "@astrojs/sitemap"
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm
- dependency-name: astro
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: npm
- dependency-name: eslint-plugin-astro
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: npm
- dependency-name: prettier-plugin-astro
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: npm
...

Signed-off-by: dependabot[bot] <[email protected]>