chore(deps): bump astro in /docs in the npm_and_yarn group (#3472)

Bumps the npm_and_yarn group in /docs with 1 update: [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro).


Updates `astro` from 4.16.17 to 4.16.18
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/astro@4.16.18/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@4.16.18/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

docs/package.json

@@ -15,7 +15,7 @@
         "@astrojs/starlight": "^0.29.2",
         "@astrojs/starlight-tailwind": "^2.0.3",
         "@astrojs/tailwind": "^5.1.3",
-        "astro": "^4.16.17",
+        "astro": "^4.16.18",
         "prettier": "^3.4.2",
         "prettier-plugin-astro": "^0.14.1",
         "prettier-plugin-tailwindcss": "^0.6.9",