fix: modify copy script

Author: kagol

packages/devui-vue/package.json

@@ -36,7 +36,7 @@
  "build:components": "node ./devui-cli/index.js build",
  "generate:theme": "node ./devui-cli/index.js generate:theme",
  "generate:dts": "node ./devui-cli/index.js generate:dts",
- "copy": "cp package.json build && cp README.md build && cp devui/theme/theme.scss build/theme",
+ "copy": "cp package.json build && cp ../../README.md build && cp devui/theme/theme.scss build/theme",
  "clean:cli": "npm uninstall -g devui-cli & npm uninstall -g vue-devui",
  "cli:create": "node ./devui-cli/index.js create -t component",
  "predev": "node ./devui-cli/index.js create -t vue-devui --ignore-parse-error",