doc: network_core_monitor: Update Kconfig option reference

CONFIG_NCM_APP_FEEDING_INTERVAL_MSEC was renamed to
CONFIG_NCM_FEEDING_INTERVAL_MSEC.

Signed-off-by: Robert Lubos <[email protected]>

Author: rlubos

doc/nrf/libraries/others/network_core_monitor.rst

@@ -62,7 +62,7 @@ Configuration
 
 To enable this library, set the :kconfig:option:`CONFIG_NET_CORE_MONITOR` Kconfig option to ``y`` on both network and application cores.
 
-The :kconfig:option:`CONFIG_NCM_APP_FEEDING_INTERVAL_MSEC` Kconfig option specifies how often the counter is updated by the network core.
+The :kconfig:option:`CONFIG_NCM_FEEDING_INTERVAL_MSEC` Kconfig option specifies how often the counter is updated by the network core.
 The default value is 500 milliseconds.
 
 The :kconfig:option:`CONFIG_NCM_RESET_INIT_PRIORITY` Kconfig option sets priority for the initialization function.