Changes to List workflow activities

the response property results/items/action became required for the status 200

the response property results/items/annotation became required for the status 200

the response property results/items/assignees became required for the status 200

the response property results/items/created_at became required for the status 200

the response property results/items/created_by became required for the status 200

the response property results/items/id became required for the status 200

the response property results/items/note became required for the status 200

the response property results/items/organization became required for the status 200

the response property results/items/url became required for the status 200

the response property results/items/workflow became required for the status 200

the response property results/items/workflow_run became required for the status 200

the response property results/items/workflow_step became required for the status 200