fix(mbe): fix issue with acceleration tx formatting

Ticket: WP-6570

Author: alextse-bg

src/masterBitgoExpress/handlers/handleAccelerate.ts

@@ -35,6 +35,7 @@ export async function handleAccelerate(
       ...params,
       customSigningFunction,
       reqId,
+      txFormat: 'psbt-lite',
     };
 
     // Accelerate transaction