fix(gist): behavior

src/pages/gist.astro

@@ -19,7 +19,6 @@ gists.sort((a, b) => a.slug.localeCompare(b.slug));
         <li class="topic">
           <a
             href={`/gist/${gist.slug}.html`}
-            data-topic="gist"
             data-gist={gist.slug}
           >
             {gist.data.title || gist.slug}