chore(deps): bump the minor-patch group across 1 directory with 4 updates

Bumps the minor-patch group with 4 updates in the / directory: [@astrojs/starlight](https://github.com/withastro/starlight/tree/HEAD/packages/starlight), [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro), [mermaid](https://github.com/mermaid-js/mermaid) and [otpauth](https://github.com/hectorm/otpauth).


Updates `@astrojs/starlight` from 0.38.3 to 0.39.2
- [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@0.39.2/packages/starlight)

Updates `astro` from 6.1.8 to 6.3.1
- [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@6.3.1/packages/astro)

Updates `mermaid` from 11.14.0 to 11.15.0
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Commits](https://github.com/mermaid-js/mermaid/compare/mermaid@11.14.0...mermaid@11.15.0)

Updates `otpauth` from 9.5.0 to 9.5.1
- [Release notes](https://github.com/hectorm/otpauth/releases)
- [Commits](hectorm/otpauth@v9.5.0...v9.5.1)

---
updated-dependencies:
- dependency-name: "@astrojs/starlight"
  dependency-version: 0.39.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-patch
- dependency-name: astro
  dependency-version: 6.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-patch
- dependency-name: mermaid
  dependency-version: 11.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-patch
- dependency-name: otpauth
  dependency-version: 9.5.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-patch
...

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Author: dependabot[bot]