Correct comment which is showing a wrong mixin call example (mixins.less)

I was copy-pasting the example and it wasn't working. Then I found that the example in the comment was a typo.
Thanks

less/mixins.less

@@ -405,7 +405,7 @@
 // Navbar vertical align
 // -------------------------
 // Vertically center elements in the navbar.
-// Example: an element has a height of 30px, so write out `.navbarVerticalAlign(30px);` to calculate the appropriate top margin.
+// Example: an element has a height of 30px, so write out `.navbar-vertical-align(30px);` to calculate the appropriate top margin.
 .navbar-vertical-align(@element-height) {
   margin-top: ((@navbar-height - @element-height) / 2);
   margin-bottom: ((@navbar-height - @element-height) / 2);