Fix model name in logs serializers

apps/logs/serializers.py

@@ -41,7 +41,7 @@ class LogSerializer(serializers.Serializer):
         if isinstance(instance, InvestigationCaseHistory):
             return MODEL_NAME_INVESTIGATION_CASE
         if isinstance(instance, MonitoringCaseHistory):
-            return MODEL_NAME_CASE_SUBJECT
+            return MODEL_NAME_MONITORING_CASE
 
     def get_author(self, instance):
         if isinstance(instance.author, Account):