Update eyebrow banner for conf (#1781)

Co-authored-by: Benjie <[email protected]>

Author: jorydotcom

theme.config.tsx

@@ -196,8 +196,7 @@ export default {
   banner: {
     content: (
       <>
-        📣 GraphQLConf 2024 • Sept 10-12 • San Francisco • Check out the
-        Schedule & Get Your Ticket •{" "}
+        🎬 That's a Wrap for GraphQLConf 2024! • Watch the Videos •{" "}
         <NextLink
           href="/conf/2024"
           className="underline after:content-['_→'] after:font-sans"