fix(textarea): update counter color

Author: brandyscarney

core/src/components/textarea/textarea.scss

@@ -441,7 +441,7 @@
    */
   @include margin-horizontal(auto, null);
 
-  color: #{$text-color-step-450};
+  color: #{$text-color-step-300};
 
   white-space: nowrap;