feat(core): micropython板卡烧录固件时支持调整波特率

common/modules/mixly-modules/electron/burn-upload.js

@@ -518,6 +518,9 @@ BU.burnByCmd = function (port, command) {
     const { mainStatusBarTabs } = Mixly;
     const statusBarTerminal = mainStatusBarTabs.getStatusBarById('output');
     statusBarTerminal.setValue(Msg.Lang['shell.burning'] + '...\n');
+    command = MString.tpl(command, {
+        baudrate: Boards.getSelectedBoardConfigParam('BurnSpeed') ?? '460800'
+    });
     BU.runCmd('burn', port, command);
 }