Electron: add bugfix in 432 release notes

Author: Nero-Hu

markdown/RTC 4.x/release-notes/en-US/framework/release_electron_ng.md

@@ -13,6 +13,7 @@ This version fixed the following issues:
 - Occasional video smoothness issues during audio and video interactions.
 - The app occasionally crashed when the decoded video resolution on the receiving end was an odd number.
 - The app occasionally crashed when remote users left the channel.
+- Calling `leaveChannelEx` without passing in the `options` parameter occasionally led to app crashes.
 - The screen occasionally flickered on the receiver's side when sharing a PPT window using [startScreenCaptureByWindowId](API/api_irtcengine_startscreencapturebywindowid.html) and playing PPT animations. (Windows)
 - The window border did not retain its original size after exiting the presentation and then maximizing the PPT window when sharing a WPS PPT window on Windows 7 using [startScreenCaptureByWindowId](API/api_irtcengine_startscreencapturebywindowid.html) and setting `enableHighLight` in [ScreenCaptureParameters](API/class_screencaptureparameters.html) to `true`. (Windows)
 - The specified window could not be brought to the foreground if it was covered by other windows when sharing a window using [startScreenCaptureByWindowId](API/api_irtcengine_startscreencapturebywindowid.html) and setting `windowFocus` and `enableHighLight` in [ScreenCaptureParameters](API/class_screencaptureparameters.html) to `true`. (Windows)