fix: ScheduleUpdateData type

[magne4000]

ScheduleUpdateData enforces id key on actions prop, but it should be optional.

Following snippet should be OK:

await client.schedule(schedule.id).update({
  actions: [{
    type: ScheduleActions.RunActor,
    actorId: 'someId',
  }]
});

But I get this error:

Type '{ type: ScheduleActions.RunActor; actorId: string; }' is not assignable to type 'ScheduleAction'.
  Property 'id' is missing in type '{ type: ScheduleActions.RunActor; actorId: string; }' but required in type 'ScheduleActionRunActor'.ts(2322)
schedule.d.ts(47, 5): 'id' is declared here.

[vladfrangu]

Thanks a lot for this, and super sorry for the fact this got lost!! 💙