Roving Tabindex Radio Example: Fix link to roving tabindex guidance

The href of the two links to the section roving tabindex was missing a '/..' so was one directory off.
Apparently did not test as broken because there is an index.html left over in the examples directory, but only in the gh-pages branch; deleting that separately.

examples/radio/radio-1/radio-1.html

@@ -208,7 +208,7 @@ <h2 id="rps_label">Role, Property, State, and Tabindex  Attributes</h2>
                 <ul>
                   <li>Makes the element focusable but not part of the page <kbd>Tab</kbd> sequence.</li>
                   <li>Applied to all radio buttons contained in the radio group except for one that is included in the page <kbd>Tab</kbd> sequence.</li>
-                  <li>This approach to managing focus is described in the section on <a href="../../#kbd_roving_tabindex">roving tabindex</a>.</li>
+                  <li>This approach to managing focus is described in the section on <a href="../../../#kbd_roving_tabindex">roving tabindex</a>.</li>
                 </ul>
               </td>
             </tr>
@@ -222,7 +222,7 @@ <h2 id="rps_label">Role, Property, State, and Tabindex  Attributes</h2>
                   <li>Set on only one radio in the radio group.</li>
                   <li>On page load, is set on the first radio button in the radio group.</li>
                   <li>Moves with focus inside the radio group so the most recently focused radio button is included in the page <kbd>Tab</kbd> sequence.</li>
-                  <li>This approach to managing focus is described in the section on <a href="../../#kbd_roving_tabindex">roving tabindex</a>.</li>
+                  <li>This approach to managing focus is described in the section on <a href="../../../#kbd_roving_tabindex">roving tabindex</a>.</li>
                 </ul>
               </td>
             </tr>