fix(typography): add removed checkbox typography

Author: simeonoff

projects/igniteui-angular/src/lib/core/styles/typography/_typography.scss

@@ -97,6 +97,7 @@
     @include igx-calendar-typography($type-scale);
     @include igx-card-typography($type-scale);
     @include igx-category-chart-typography($type-scale);
+    @include igx-checkbox-typography($type-scale);
     @include igx-chip-typography($type-scale);
     @include igx-column-hiding-typography($type-scale);
     @include igx-data-chart-typography($type-scale);