build(deps): bump astro from 4.16.10 to 4.16.18

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 4.16.10 to 4.16.18.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/[email protected]/packages/astro/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/[email protected]/packages/astro)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -30,7 +30,7 @@
     "@astrojs/sitemap": "3.2.1",
     "@astrojs/svelte": "5.7.3",
     "@astrojs/tailwind": "5.1.2",
-    "astro": "4.16.10",
+    "astro": "4.16.18",
     "astro-expressive-code": "^0.38.3",
     "rehype-katex": "^7.0.1",
     "remark-math": "^6.0.0",