studio - corrects some errand new icon-based typography rules to use the line-height() mixin

cms/static/sass/elements/_typography.scss

@@ -134,45 +134,45 @@
 // icons
 .t-icon1 {
   @include font-size(48);
-  @include lh(48);
+  @include line-height(48);
 }
 
 .t-icon2 {
   @include font-size(36);
-  @include lh(36);
+  @include line-height(36);
 }
 
 .t-icon3 {
   @include font-size(24);
-  @include lh(24);
+  @include line-height(24);
 }
 
 .t-icon4 {
   @include font-size(18);
-  @include lh(18);
+  @include line-height(18);
 }
 
 .t-icon5 {
   @include font-size(16);
-  @include lh(16);
+  @include line-height(16);
 }
 
 .t-icon6 {
   @include font-size(14);
-  @include lh(14);
+  @include line-height(14);
 }
 
 .t-icon7 {
   @include font-size(12);
-  @include lh(12);
+  @include line-height(12);
 }
 
 .t-icon8 {
   @include font-size(11);
-  @include lh(11);
+  @include line-height(11);
 }
 
 .t-icon9 {
   @include font-size(10);
-  @include lh(10);
+  @include line-height(10);
 }