chore(deps): bump the npm group with 3 updates (#1273)

Bumps the npm group with 3 updates: [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight), [sharp](https://github.com/lovell/sharp) and [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `@astrojs/starlight` from 0.42.4 to 0.42.5
- [Release notes](https://github.com/withastro/starlight/releases)
- [Changelog](https://github.com/withastro/starlight/blob/main/packages/starlight/CHANGELOG.md)
- [Commits](https://github.com/withastro/starlight/commits/@astrojs/starlight@0.42.5/packages/starlight)

Updates `sharp` from 0.35.4 to 0.35.5
- [Release notes](https://github.com/lovell/sharp/releases)
- [Commits](lovell/sharp@v0.35.4...v0.35.5)

Updates `vitest` from 5.0.2 to 5.0.3
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v5.0.3/packages/vitest)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.42.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm
- dependency-name: sharp
  dependency-version: 0.35.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm
- dependency-name: vitest
  dependency-version: 5.0.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm
...

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Author: dependabot[bot]