chore(deps): update dependency astro to v6 [security]

Author: renovate[bot]

package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@eslint/eslintrc": "^3.3.4",
     "@eslint/js": "^10.0.1",
-    "astro": "^5.17.3",
+    "astro": "^6.0.0",
     "astro-compress": "^2.3.9",
     "globals": "^17.3.0",
     "unist-util-visit": "^5.1.0"