Bump astro from 4.13.1 to 4.16.18

Bumps [astro](https://github.com/withastro/astro/tree/HEAD/packages/astro) from 4.13.1 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
...

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

package.json

@@ -26,7 +26,7 @@
     "@iconify-json/simple-icons": "1.1.112",
     "@savvywombat/tailwindcss-grid-areas": "4.0.0",
     "@tailwindcss/typography": "0.5.13",
-    "astro": "4.13.1",
+    "astro": "4.16.18",
     "astro-icon": "1.1.0",
     "astro-navbar": "2.3.3",
     "contentful": "10.12.16",