Update dependency astro to v5

Author: renovate[bot]

package.json

@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "@types/byte-size": "^8.1.0",
-    "astro": "^2.0.16",
+    "astro": "^5.0.0",
     "byte-size": "^8.1.0",
     "fast-glob": "^3.2.12",
     "lighthouse": "9.6.8",