Run `grunt`.

docs/_includes/customizer-variables.html

@@ -71,6 +71,11 @@
     <input id="input-@link-hover-color" type="text" value="darken(@link-color, 15%)" data-var="@link-hover-color" class="form-control"/>
     <p class="help-block">Link hover color set via <code>darken()</code> function.</p>
   </div>
+  <div class="bs-customizer-input">
+    <label for="input-@link-hover-decoration">@link-hover-decoration</label>
+    <input id="input-@link-hover-decoration" type="text" value="underline" data-var="@link-hover-decoration" class="form-control"/>
+    <p class="help-block">Link hover decoration.</p>
+  </div>
 </div>
 <h2 id="typography">Typography</h2>
 <p>Font, line-height, and color for body text, headings, and more.</p>