message: docs: fix example styling
diff: <template>
  <div>
  <ValidationObserver ref="form">
  - <h2>Cross field rule</h2>
  - <ValidationProvider
  - vid="first"
  - name="First"
  - rules="required|confirmedBy:@second"
  - v-slot="{ errors }"
  - >
  + <ValidationProvider vid="first" name="First" rules="required|confirmedBy:@second" v-slot="{ errors }">
  First
  <input type="text" v-model="first" />
  <span>{{ errors[0] }}</span>
  @@ -49,8 +43,7 @@ export default {
  };
  </script>
  -
  -<style>
  +<style scoped>
  span {
  display: block;
  margin-top: 20px;
  