message: docs(Icon): separate usingUrl demo from basicUsage
diff: @@ -99,6 +99,11 @@ const copy = (icon: string, option: Record<string, unknown> = {}) => {
  <van-col span="6" @click="copy(demoIcon)">
  <van-icon :name="demoIcon" />
  </van-col>
  + </van-row>
  + </demo-block>
  +
  + <demo-block :title="t('usingUrl')">
  + <van-row>
  <van-col span="6" @click="copy(demoImage)">
  <van-icon :name="demoImage" />
  </van-col>
  