Switch Example Using HTML Checkbox: Fix editorial error in accessibil…

…ity features documentation (pull #2750)

Inaccurate text:
When an element loses focus, its border changes from two pixels to two and padding is increased by two pixels. 

Corrected text:
When an element loses focus, its border changes from two pixels to zero and padding is increased by two pixels.

content/patterns/switch/examples/switch-checkbox.html

@@ -102,7 +102,7 @@ <h2>Accessibility Features</h2>
                 Note: Because transparent borders are visible on some systems with operating system high contrast settings enabled, transparency cannot be used to create a visual difference between the element that is focused an other elements.
                 Instead of using transparency, the focused element has a thicker border and less padding.
                 When an element receives focus, its border changes from zero to two pixels and padding is reduced by two pixels.
-                When an element loses focus, its border changes from two pixels to two and padding is increased by two pixels.
+                When an element loses focus, its border changes from two pixels to zero and padding is increased by two pixels.
               </li>
             </ul>
           </li>