Update app.py

app.py

@@ -104,7 +104,7 @@ def user_report():
       'Technician Skill level':Technician_Skill_level,
       'Prior Maintenance': prior_maintainence,
       'Logistics Time (hr)':Logistics_Time,
-      'total_operating_hours':total_operating_hour,
+      'total_operating_hours':total_operating_hours,
       'operating_temperature':operating_temperature,
       'previous_number_of_repairs':previous_number_of_repairs,
       'Power_Input_Voltage':Power_Input_Voltage