style: add top margin to article headings

Author: carsakiller

src/components/wiki/Heading.astro

@@ -82,6 +82,14 @@ export interface Props {
       }
     }
 
+    :global(h2),
+    :global(h3),
+    :global(h4),
+    :global(h5),
+    :global(h6) {
+      margin-top: 1em;
+    }
+
     &:target {
       :global(h1),
       :global(h2),