Documentation: add daemon-job-timeout
Two simple things to fix:

* The `--daemon-job-timeout` flag is missing from https://xmrig.com/docs/miner/command-line-options  (but it is visible via `--help`)
* The `daemon-job-timeout` parameter is missing from https://xmrig.com/docs/miner/config/pool (please be sure to note that the value is in milliseconds and defaults to 15000)

Thanks SChernykh!