message: fix(md-enhance): fix code demo script inject
diff: @@ -144,7 +144,7 @@ export const injectScript = (
  script.appendChild(
  document.createTextNode(
  // here we are fixing `document` variable back to shadowDOM
  - `{const document=window.document.querySelector('#${id} .demo-wrapper').shadowRoot;\n${scriptText}}`
  + `{const document=window.document.querySelector('#${id} .code-demo-container').shadowRoot;\n${scriptText}}`
  )
  );
  shadowRoot.appendChild(script);
  