suspend fun changeIssuePriority(input: ChangeIssuePriorityInput, dfe: DataFetchingEnvironment): PriorityChangedEvent?
Changes the `priority` of an Issue requires MANAGE_ISSUES on any of the Trackables the Issue is on. Additionally, the IssuePriority must be defined by the Template of the Issue. If the `priority` is equal to the already existing `priority`, no event is created.