CodeGen from PR 19367 in Azure/azure-rest-api-specs

{AzureCXP} fixes Azure/azure-sdk-for-python#24694 (Azure#19367)

* {AzureCXP} fixes Azure/azure-sdk-for-python#24694

Including the possible values for the enum of the runbook types

Docs Link: https://docs.microsoft.com/en-us/python/api/azure-mgmt-automation/azure.mgmt.automation.models.runbook?view=azure-python#parameters

fixes #24694

In this PR  Azure/azure-sdk-for-python#24745, we were asked to fix the REST API Specs before the changes are implemented in SDK.

* Update runbook.json

* Update runbook.json