Set DailyVideo width to 3/4

Update FixAV.jsx to change the DailyVideo element's Tailwind class from w-full to w-3/4, reducing the video's displayed width for improved layout/alignment in the call UI.

Author: JamesPHoughton

client/src/call/FixAV.jsx

@@ -704,7 +704,7 @@ export function useFixAV(
             <DailyVideo
               sessionId={localSessionId}
               mirror
-              className="h-auto max-h-40 w-full rounded-lg object-contain"
+              className="h-auto max-h-40 w-3/4 rounded-lg object-contain"
             />
           </div>
         </div>