use gif instead of webm for compatibility

Author: riccardobl

src/components/x-roadmap.html

@@ -24,7 +24,7 @@
                 <b>RTC over Nostr signaling</b>, enabling easy development of decentralized games and apps
             </x-task>
 
-            <x-milestone  title="v0.0.x NGE" vid="imgs/nge-v0.webm">
+            <x-milestone  title="v0.0.x NGE" img="imgs/nge-v0.gif">
                 <p>
                     At this stage, the engine supports P2P networking and essential Nostr functionalities,
                     including