chore(deps): bump astro from 5.15.9 to 5.18.1 in /website

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 5.15.9 to 5.18.1.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/astro@5.18.1/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/astro@5.18.1/packages/astro)

---
updated-dependencies:
- dependency-name: astro
  dependency-version: 5.18.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

website/package.json

@@ -15,7 +15,7 @@
 		"@astrojs/deno": "5.0.1",
 		"@astrojs/rss": "4.0.9",
 		"@astrojs/tailwind": "6.0.0-beta.0",
-		"astro": "5.15.9",
+		"astro": "5.18.1",
 		"rehype-accessible-emojis": "0.3.2",
 		"rehype-autolink-headings": "7.1.0",
 		"rehype-slug": "6.0.0",