Update hid_keyboard.go

Added attribute to explicitly keep currently needed out endpoint and to make listed attributes consistent across the keyboard and mouse devices.

internal/usbgadget/hid_keyboard.go

@@ -17,6 +17,7 @@ var keyboardConfig = gadgetConfigItem{
 		"protocol":        "1",
 		"subclass":        "1",
 		"report_length":   "8",
+		"no_out_endpoint": "0",		
 	},
 	reportDesc: keyboardReportDesc,
 }