Update app.py

app.py

@@ -185,7 +185,7 @@ class CRMJABot:
     """Assistente de estudos aprimorado para o Revalida"""
     
     def __init__(self):
-        self.db = RevalidaDatabase()
+        self.db = DatabaseManager()
         self.planner = StudyPlanGenerator(self.db)
         self.coach = MotivationalCoach()
         self.analytics = StudyAnalytics(self.db.conn)