message: docs(theme): fix heading style
diff: @@ -21,7 +21,7 @@ You should set the default theme color of your site in `.vuepress/styles/palette
  $theme-color: #f00;
  ```
  -## Theme Color Picker
  +## Theme Color Picker {#theme-color-picker-title}
  You need to set `themeColor` with `{ colorName1: colorValue1, colorName2: colorValue2, ... }` format:
  