fix(deps): update dependency astro to v5

Author: renovate[bot]

Diff for: package.json

@@ -18,7 +18,7 @@
     "@astrojs/tailwind": "^5.0.0",
     "@markdoc/markdoc": "^0.4.0",
     "@tailwindcss/typography": "^0.5.9",
-    "astro": "^4.0.0",
+    "astro": "^5.0.0",
     "astro-markdoc-renderer": "0.0.1-alpha.1",
     "glob": "^11.0.0",
     "globby": "^14.0.1",