fix: jdesign taro demo build

Author: Miles-hxy

packages/nutui-taro-demo/package.json

@@ -12,8 +12,7 @@
     "dev": "taro build --watch --type",
     "dev:jmapp": "VITE_APP_PROJECT_ID=jmapp taro build --watch --type",
     "build": "taro build --type",
-    "build:jmapp": "taro build --type",
-
+    "build:jmapp": "VITE_APP_PROJECT_ID=jmapp taro build --type",
     "build:weapp": "taro build --type weapp",
     "build:swan": "taro build --type swan",
     "build:alipay": "taro build --type alipay",