workaround to fix crash on LFAudioCapture.swift

Author: macbaszii

LFLiveKit/capture/LFAudioCapture.m

@@ -98,7 +98,7 @@ - (instancetype)initWithAudioConfiguration:(LFLiveAudioConfiguration *)configura
 - (void)dealloc {
     [[NSNotificationCenter defaultCenter] removeObserver:self];
 
-    dispatch_async(self.taskQueue, ^{
+    dispatch_sync(self.taskQueue, ^{
         if (self.componetInstance) {
             self.isRunning = NO;
             AudioOutputUnitStop(self.componetInstance);