[Step] Fix the bad step count in a segment

[prudho]

Before:

After:

Test case:

<div class="ui ordered steps">
  <div class="completed step">
    <div class="content">
      <div class="title">Shipping</div>
      <div class="description">Choose your shipping options</div>
    </div>
  </div>
  <div class="completed step">
    <div class="content">
      <div class="title">Billing</div>
      <div class="description">Enter billing information</div>
    </div>
  </div>
  <div class="active step">
    <div class="content">
      <div class="title">Confirm Order</div>
      <div class="description">Verify order details</div>
    </div>
  </div>
</div>

<div class="ui segment">
  <div class="ui ordered steps">
    <div class="completed step">
      <div class="content">
        <div class="title">Shipping</div>
        <div class="description">Choose your shipping options</div>
      </div>
    </div>
    <div class="completed step">
      <div class="content">
        <div class="title">Billing</div>
        <div class="description">Enter billing information</div>
      </div>
    </div>
    <div class="active step">
      <div class="content">
        <div class="title">Confirm Order</div>
        <div class="description">Verify order details</div>
      </div>
    </div>
  </div>
</div>