fix: correct client postinstall

Author: KevinWu098

client/package.json

@@ -12,7 +12,7 @@
     "lint": "eslint",
     "format": "npx prettier --write .",
     "preview": "vite preview",
-    "postinstall": "patch-package"
+    "postinstall": "npx patch-package"
   },
   "dependencies": {
     "@chakra-ui/react": "^2.8.2",