Update index.html

If merged, this PR updates step 2C to be the agreed upon text per this issue: w3c/accname#244

accname/index.html

@@ -554,9 +554,7 @@ <h4>Computation steps</h4>
                   </div>
                 </li>
                 <li id="comp_embedded_control">
-                  <span id="step2C"><!-- Don't link to this legacy numbered ID. --></span><em>Embedded Control:</em> Otherwise, if the <code>current node</code> is a control embedded within the label
-                  (e.g. any element directly referenced by <code>aria-labelledby</code>) for another <a class="termref">widget</a>, where the user can adjust the embedded control's value, then return
-                  the embedded control as part of the text alternative in the following manner:
+                  <span id="step2C"><!-- Don't link to this legacy numbered ID. --></span><em>Embedded Control:</em> Otherwise, if the <code>current node</code> is a user-adjustable control embedded within the label, and the control is not the element being named or described, then return the embedded control's value as part of the text alternative in the following manner:
                   <ol>
                     <li id="comp_embedded_control_textbox"><em>Textbox:</em> If the embedded control has role <a class="role-reference" href="#textbox">textbox</a>, return its value.</li>
                     <li id="comp_embedded_control_combobox_or_listbox">