chore: upgrade pnpm

Author: sxzz

package.json

@@ -2,7 +2,7 @@
   "name": "vue2-rspack",
   "version": "0.1.0",
   "private": true,
-  "packageManager": "pnpm@8.15.5",
+  "packageManager": "pnpm@9.6.0",
   "scripts": {
     "serve": "rspack serve",
     "build": "rspack build"