chore: 更新 package.json 中的 pnpm 版本至 9.15.7

Author: Little-LittleProgrammer

package.json

@@ -21,10 +21,10 @@
     "lint-staged": "catalog:",
     "husky": "catalog:"
   },
-  "packageManager": "pnpm@8.15.9",
+  "packageManager": "pnpm@9.15.7",
   "name": "lowcode-engine",
   "volta": {
     "node": "18.18.2",
-    "pnpm": "8.15.9"
+    "pnpm": "9.15.7"
   }
 }