refactor: update download link to internal route and hide demo button

src/components/DownloadLink.tsx

@@ -4,10 +4,8 @@ import { ArrowDownTrayIcon } from '@heroicons/react/24/solid'
 export function DownloadLink() {
   return (
     <Link
-      href="https://github.com/threefoldtech/mycelium/releases"
+      href="/download"
       aria-label="Download Mycelium"
-      target="_blank"
-      rel="noopener noreferrer"
       className="inline-flex items-center rounded-lg bg-cyan-500 px-4 py-2 text-sm font-semibold text-white hover:bg-cyan-600 transition-colors"
     >
       <ArrowDownTrayIcon className="h-5 w-5 mr-2" />

src/components/Hero.tsx

@@ -117,13 +117,13 @@ export function Hero() {
             </p>
             <div className="mt-8 flex flex-wrap gap-x-6 gap-y-4">
               <DownloadLink />
-              <Button
+              {/* <Button
                 href="https://youtu.be/4oq15lxvkts?si=Heh_8DHqHaNpy3_F"
                 variant="outline"
               >
                 <PlayIcon className="h-6 w-6 flex-none" />
                 <span className="ml-2.5">Watch the Demo</span>
-              </Button>
+              </Button> */}
             </div>
           </div>
           <div className="relative lg:mt-10 mt-0  lg:col-span-5 lg:row-span-2 xl:col-span-6">