Update top posts and upvote to pass/get title

static/upvote.js

@@ -19,8 +19,12 @@
     const alreadyVoted = btn.hasAttribute("voted");
 
     const method = alreadyVoted ? "DELETE" : "POST";
+
     const r = await fetch(`${API}/posts/${slug}/vote`, {
       method,
+      body: JSON.stringify({
+        title: document.querySelector('meta[name="title"]').content,
+      }),
       credentials: "include",
     });