Bug in offline_conversions.py

[woto]

Hi, after running the python ./offline_conversions.py

I get an error:

(base) ➜  v13 git:(main) ✗ python ./offline_conversions.py
Loading the web service client proxies...
-----
AddConversionGoals:
ConversionGoalIds:
Array Of long:
129106842
PartialErrors:
-----
GetConversionGoalsByIds:
ConversionGoals:
* * * Begin output_conversiongoal * * *
ConversionWindowInMinutes: 43200
CountType: All
ExcludeFromBidding: False
'OfflineConversionGoal' object has no attribute 'GoalCategory'

Tested on 803bcd5

Thank you :)