chore(deps): update pnpm to v12

Author: renovate[bot]

package.json

@@ -2,7 +2,7 @@
   "name": "nuxi-workspace",
   "type": "module",
   "private": true,
-  "packageManager": "pnpm@11.25.0",
+  "packageManager": "pnpm@12.3.4",
   "description": "⚡️ Nuxt Generation CLI Experience",
   "license": "MIT",
   "repository": "nuxt/cli",