Shawburn: Fix Interpolation issue in comment-meta style

shawburn/style-rtl.css

@@ -3298,7 +3298,7 @@ body:not(.fse-enabled) .footer-menu a {
  * Comment Meta
  */
 .comment-meta {
-	margin-left: calc( $avatar-size + (0.5 * 16px));
+	margin-left: calc( 32px + (0.5 * 16px));
 }
 
 .comment-meta .comment-author {

shawburn/style.css

@@ -3315,7 +3315,7 @@ body:not(.fse-enabled) .footer-menu a {
  * Comment Meta
  */
 .comment-meta {
-	margin-right: calc( $avatar-size + (0.5 * 16px));
+	margin-right: calc( 32px + (0.5 * 16px));
 }
 
 .comment-meta .comment-author {