Update Discord invite link in footer

Author: CoderInWaves

index.html

@@ -371,7 +371,7 @@ <h3>With ZENTAXA</h3>
                         <circle cx="4" cy="4" r="2" />
                     </svg>
                 </a>
-                <a href="https://discord.gg/mK55UDmd" target="_blank" aria-label="Discord"
+                <a href="https://discord.gg/Y9eNzbPv" target="_blank" aria-label="Discord"
                     class="hover:text-white transition-colors">
                     <svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor"
                         xmlns="http://www.w3.org/2000/svg">