Keyboard - Allow > 8 keyboard max report size

There has been at least one keyboard that does not report the report size !=8 that works...

So try to allow for any that report >=8  <=64 to work.

keyboard.cpp

 	if (descriptors[21] != 3) return false; // must be interrupt type
 	uint32_t size = descriptors[22] | (descriptors[23] << 8);
 	println("packet size = ", size);
-	if (size != 8) {
-		return false; // must be 8 bytes for Keyboard Boot Protocol
+	if ((size < 8) || (size > 64)) {
+		return false; // Keyboard Boot Protocol is 8 bytes, but maybe others have longer... 
 	}
 #ifdef USBHS_KEYBOARD_INTERVAL 
 	uint32_t interval = USBHS_KEYBOARD_INTERVAL;