fix(deps): update dependency astro to v4.16.18 [security]

Author: renovate[bot]

apps/site/package.json

@@ -16,7 +16,7 @@
     "@iconify-json/ri": "1.1.22",
     "@tailwindcss/forms": "0.5.7",
     "@tailwindcss/typography": "0.5.13",
-    "astro": "4.11.6",
+    "astro": "4.16.18",
     "astro-icon": "1.1.0",
     "sanitize-html": "2.13.0",
     "simple-stack-form": "0.1.12",