update welcome message

src/controllers/_bot_controller.py

@@ -21,7 +21,7 @@ class BotController:
 
     def get_welcome_message(self, firstname):
 
-        return f"""Hi {firstname} 👋\n\nWelcome to the Mandala Slackbot! Every week, you'll receive a learning tailored from the Resilient Leadership program to support you on your leadership journey. If you'd like to make this content even more personalized, share your Resilient Leadership guidebook with us either as an attachment or a link to the slide deck.\n\nOtherwise, we'll plan on sharing our curated weekly insights to keep you growing. 🙂\n\nYou can refresh the content at any time by simply typing **/refresh** and sending that guidebook back our way. Looking forward to getting started! Your first learning will arrive next week.\n\nWarmly,\nTeam Mandala"""
+        return f"""Hi {firstname} 👋\n\nWelcome to the Mandala Slackbot! Every week, you'll receive a learning tailored from the Resilient Leadership program to support you on your leadership journey. If you'd like to make this content even more personalized, share your Resilient Leadership guidebook with us either as an attachment or a link to the slide deck.\n\nOtherwise, we'll plan on sharing our curated weekly insights to keep you growing. 🙂\n\nYou can refresh the content at any time by simply typing */refresh* and sending that guidebook back our way. Looking forward to getting started! Your first learning will arrive next week.\n\nWarmly,\nTeam Mandala"""
 
     async def process_event_background(self, event: dict):
         try: