I'm a newbie in creating Python Lambda function and I'm trying to figure out how to convert all the timestamps inside my JSON data into a date time format (2021-08-31T11:20:42.264+08:00). Sample data below:

```
{'Id': 'jr_e10ba9a2ab867b3abb3b1f8955cfd1815e1ce00cc981230702dfad45fb49a4b9', 
'Attempt': 0, 
'JobName': 'my_job_name', 
'StartedOn': datetime.datetime(2021, 8, 31, 3, 17, 34, 49000, tzinfo=tzlocal()), 
'LastModifiedOn': datetime.datetime(2021, 8, 31, 3, 19, 34, 855000, tzinfo=tzlocal()), 
'CompletedOn': datetime.datetime(2021, 8, 31, 3, 19, 34, 855000, tzinfo=tzlocal()), 
'JobRunState': 'FAILED'}

```