add text promt to gather

lib/tasks/cognigy/index.js

@@ -235,7 +235,7 @@ class Cognigy extends Task {
     this.logger.info({prompts: this.prompts}, 'Cognigy:_onBotFinalPing');
     try {
       await this.taskQueue.lastPromise;
-      this.gatherTask = this._makeGatherTask();
+      this.gatherTask = this._makeGatherTask({textPrompt: "this is a text promt"});
       this.gatherTask.exec(cs, ep, this)
         .catch((err) => this.logger.info({err}, 'Cognigy gather task returned error'));
       this.prompts = [];