fix: [post-toc] Remove bottom margin for lists

This is done to prevent empty space between list items when there are
multiple levels in table of contents (toc).

Author: manid2

assets/styles/_post.scss

@@ -103,6 +103,11 @@
     @media print {
       display: none;
     }
+
+    ul,
+    ol {
+      margin-bottom: 0;
+    }
   }
 
   &-cover {