chore(deps): bump the github-actions group across 1 directory with 5 updates (#1575)

Bumps the github-actions group with 5 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [@astrojs/vercel](https://github.com/withastro/astro/tree/HEAD/packages/integrations/vercel) | `10.0.2` | `10.0.3` |
| [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) | `6.0.8` | `6.1.1` |
| [starlight-links-validator](https://github.com/HiDeoo/starlight-links-validator/tree/HEAD/packages/starlight-links-validator) | `0.20.1` | `0.21.0` |
| [vercel](https://github.com/vercel/vercel/tree/HEAD/packages/cli) | `50.37.0` | `50.37.3` |
| [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) | `4.1.1` | `4.1.2` |



Updates `@astrojs/vercel` from 10.0.2 to 10.0.3
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/integrations/vercel/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/[email protected]/packages/integrations/vercel)

Updates `astro` from 6.0.8 to 6.1.1
- [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 `starlight-links-validator` from 0.20.1 to 0.21.0
- [Release notes](https://github.com/HiDeoo/starlight-links-validator/releases)
- [Changelog](https://github.com/HiDeoo/starlight-links-validator/blob/main/packages/starlight-links-validator/CHANGELOG.md)
- [Commits](https://github.com/HiDeoo/starlight-links-validator/commits/[email protected]/packages/starlight-links-validator)

Updates `vercel` from 50.37.0 to 50.37.3
- [Release notes](https://github.com/vercel/vercel/releases)
- [Changelog](https://github.com/vercel/vercel/blob/main/packages/cli/CHANGELOG.md)
- [Commits](https://github.com/vercel/vercel/commits/[email protected]/packages/cli)

Updates `vitest` from 4.1.1 to 4.1.2
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.2/packages/vitest)

---
updated-dependencies:
- dependency-name: "@astrojs/vercel"
  dependency-version: 10.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: astro
  dependency-version: 6.1.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
- dependency-name: starlight-links-validator
  dependency-version: 0.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: github-actions
- dependency-name: vercel
  dependency-version: 50.37.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: github-actions
- dependency-name: vitest
  dependency-version: 4.1.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]