fix(deps): update dependency @astrojs/vercel to v9

Author: renovate[bot]

package-lock.json

@@ -14,7 +14,7 @@
 		"@astrojs/react": "4.4.2",
 		"@astrojs/rss": "4.0.13",
 		"@astrojs/sitemap": "3.6.0",
-		"@astrojs/vercel": "8.2.11",
+		"@astrojs/vercel": "9.0.0",
 		"@tailwindcss/vite": "4.1.17",
 		"@types/react": "19.2.2",
 		"@types/react-dom": "19.2.2",