Update Open API

[ckunki]

The latest version of upstream openapi contains additional fields for object Schedules:

• createdbyID
• createdbyFirstName
• createdbyLastName

See failed build https://github.com/exasol/saas-api-python/actions/runs/11247097876

"createdbyID": {
    "type": "string"
},
"createdbyFirstName": {
    "type": "string"
},
"createdbyLastName": {
    "type": "string"
},