[sonic-platform-daemons] submodule update (#7709)

Includes following commits

9297a29 Mock path early so it will applied to sonic_py_common, mock platform_chassis (#188)
9ba52a2 Mock path early so it will applied to sonic_py_common, mock more swsscommon classes (#187)
1adf47b [chassisd] Add script to initialize chassis info in STATE_DB (#183)