Fix import path for MSPHelper

Author: Erics1337

src/components/tabs/ConfigurationTab.vue

@@ -518,7 +518,7 @@ import GUI from "../../js/gui";
 import FC from "../../js/fc";
 import MSP from "../../js/msp";
 import MSPCodes from "../../js/msp/MSPCodes";
-import { mspHelper } from "../../js/msp/MSPHelper";
+import { mspHelper } from "../../js/msp/MSPHelper.js";
 import { reinitializeConnection } from "../../js/serial_backend";
 import { gui_log } from "../../js/gui_log";
 import { i18n } from "../../js/localization";