utility.jumbo: this has been broken for about a year or more because of a forgotten not

src/modules/utility.js

@@ -1180,7 +1180,7 @@ jumbo.callback = async function (msg, line) {
 
     const emojiFound = await fetch(url, {method: "HEAD"}).then((res) => res.ok);
 
-    if (emojiFound) {
+    if (!emojiFound) {
       return "Emoji not found. The emoji set chosen might not have this emote as an image.";
     }