refactor: update favicon and adjust Footer tagline and NoSinglePoint animation dimensions

- Replaced favicon.ico with new version
- Changed Footer tagline from "Unleash the Power of Decentralization" to "Built for Digital Sovereignty"
- Adjusted NoSinglePoint animation dimensions from 720x540 to 720x420 for better alignment with other home animations
- Updated dimension comments to reflect aspect ratio and visual height alignment goals

src/components/Footer.tsx

@@ -11,7 +11,7 @@ export function Footer() {
               <img src="/images/logomark.svg" alt="Mycelium Logomark" className="h-13 w-13 flex-none" />
               <div className="ml-4">
                 <p className="text-base lg:text-lg font-semibold">Project Mycelium</p>
-                <p className="mt-1 text-sm">Unleash the Power of Decentralization</p>
+                <p className="mt-1 text-sm">Built for Digital Sovereignty</p>
               </div>
             </div>
             <nav className="mt-10 flex gap-8">