chore(deps): update peerdependency nitropack to v2

Author: renovate[bot]

.stacks/core/server/package.json

@@ -47,7 +47,7 @@
   },
   "peerDependencies": {
     "@stacksjs/path": "workspace:*",
-    "nitropack": "^1.0.0",
+    "nitropack": "^2.6.3",
     "vite": "^3.2.5"
   },
   "devDependencies": {