Make the time to return the dirty plates longer

src/classes/task3/kitchen.js

@@ -83,7 +83,8 @@ class Kitchen{
     }
 
     async _returnDirtyPlates(msg){
-        let rndTime = 8000 + Math.floor(Math.random() * 7000);
+        let rndTime = 70000 + Math.floor(Math.random() * 30000);
+        log('The customers are eating the prepared food. The plates will be brought back soon...')
         await this.tick(rndTime);
         while(this._returningPlates){
             await this.tick(100);