fixed gather cannot timeout if listenDuringPrompt is true (#1276)

* fixed gather cannot timeout if listenDuringPrompt is true

* wip

* wip

* wip

lib/session/call-session.js

@@ -3009,6 +3009,11 @@ Duration=${duration} `
     const task = this.currentTask;
     if (task && TaskName.Say === task.name) {
       task.notifyTtsStreamIsEmpty();
+    } else if (
+      // If Gather nested say task is streaming
+      TaskName.Gather === task.name && task.sayTask && task.sayTask.isStreamingTts) {
+      const sayTask = task.sayTask;
+      sayTask.notifyTtsStreamIsEmpty();
     }
   }