fix(usb): increase read delay

fixes broken hello_usb test on SDK 1.5.1

Author: urish

src/peripherals/usb.ts

@@ -120,7 +120,7 @@ export class RPUSBController extends BasePeripheral {
   onEndpointWrite?: (endpoint: number, buffer: Uint8Array) => void;
   onEndpointRead?: (endpoint: number, byteCount: number) => void;
 
-  readDelayMicroseconds = 1;
+  readDelayMicroseconds = 10;
   writeDelayMicroseconds = 10; // Determined empirically
 
   get intStatus() {