Applies a new auto shutdown configuration to a Live Encoding that is already running, without interrupting
the stream.

The body is a full replacement, not a partial update. Every field that is omitted or set to null
disarms the corresponding timer, and an empty body {} disarms all timers. Always send the complete
configuration you want the encoding to run with, including the values you want to keep.

streamTimeoutMinutes is counted from this call, not from the start of the encoding. The encoding is
stopped that many minutes after the update is accepted, whereas in the start request the same field is
counted from when the encoding started. An encoding started at 12:00 with streamTimeoutMinutes of 120 is
scheduled to stop at 14:00; updating it at 13:30 with streamTimeoutMinutes of 150 moves the shutdown to
16:00, not to 14:30. bytesReadTimeoutSeconds is relative by nature, as it always counts from the last byte
received, and waitingForFirstConnectTimeoutMinutes has no effect once the input is connected.

The organization's maximum live encoding runtime still bounds the total runtime of the encoding, measured
from the start of the encoding. An update that would push the shutdown past that limit is rejected rather
than extending the encoding beyond it.

Do not leave the call to the last few seconds. The update is rejected with 409 when any armed shutdown
timer is within 10 seconds of firing, because at that point the shutdown sequence is effectively already in
flight.