Bundle npm dependencies for docs/package.json

[github-actions]

This issue bundles 3 Dependabot PRs for npm dependencies in docs/package.json.

PRs included:

• Bump astro from 5.16.12 to 5.16.15 in /docs #12015 - Bump astro from 5.16.12 to 5.16.15
• Bump @astrojs/starlight from 0.37.3 to 0.37.4 in /docs #12013 - Bump @astrojs/starlight from 0.37.3 to 0.37.4
• Bump @playwright/test from 1.57.0 to 1.58.0 in /docs #12010 - Bump @playwright/test from 1.57.0 to 1.58.0

Instructions:
Review and merge the PRs above, ensuring compatibility and no breaking changes.

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