Fixed typo in demo

Author: 4Giedrius

demo/index.html

@@ -231,7 +231,7 @@ <h2>Radios</h2>
                     <div class="checkbox checkbox">
                         <input type="radio" name="radio4" id="radio7" value="option1" checked>
                         <label for="radio7">
-                            Defeault
+                            Default
                         </label>
                     </div>
                     <div class="checkbox checkbox-success">