Bump the docker-backward-compatible group in /docs with 3 updates (#854)

Bumps the docker-backward-compatible group in /docs with 3 updates: [@tailwindcss/vite](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-vite), [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) and [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss).


Updates `@tailwindcss/vite` from 4.1.18 to 4.2.1
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.2.1/packages/@tailwindcss-vite)

Updates `astro` from 5.17.3 to 5.18.0
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/astro@5.18.0/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@5.18.0/packages/astro)

Updates `tailwindcss` from 4.1.18 to 4.2.1
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.2.1/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/vite"
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-backward-compatible
- dependency-name: astro
  dependency-version: 5.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-backward-compatible
- dependency-name: tailwindcss
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-backward-compatible
...

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

docs/package.json

@@ -17,8 +17,8 @@
     "@astrojs/svelte": "^7.2.5",
     "@fontsource/ibm-plex-mono": "^5.2.7",
     "@fontsource/ibm-plex-sans": "^5.2.8",
-    "@tailwindcss/vite": "^4.1.18",
-    "astro": "^5.17.1",
+    "@tailwindcss/vite": "^4.2.1",
+    "astro": "^5.18.0",
     "sharp": "^0.34.5",
     "starlight-openapi": "^0.22.0",
     "svelte": "^5.53.6",