fix: link sponsorship prospectus as a link instead of static pdf (#1713)

Author: YassinEldeeb

public/conf/sponsor/sponsor_2024.pdf

@@ -3,7 +3,7 @@ import { Button } from "@/app/conf/_components/button"
 <h1 id="sponsor">Sponsor GraphQLConf 2024</h1>
 
 <div className="flex flex-row justfiy-center">
-    <Button target="_blank" href="/conf/sponsor/sponsor_2024.pdf" className="!text-white !block">Sponsorship Details</Button>
+    <Button target="_blank" href="https://events.linuxfoundation.org/sponsor-GraphQLConf-24" className="!text-white !block">Sponsorship Details</Button>
     <Button href="mailto:[email protected]?subject=Sponsorships" className="!text-white !block ml-3.5">Contact Us</Button>
 </div>
 Contact us at [email protected] to reserve your sponsorship, ask questions or talk about different options.