Bluetooth: Mesh: Doc: fix sensor server sample doc

Adds two missing settings entries to the sample documentation.

Signed-off-by: Håvard Reierstad <[email protected]>

samples/bluetooth/mesh/sensor_server/README.rst

@@ -113,7 +113,11 @@ The descriptor also specifies the temperature sensor's sampling type, which is :
 
 The :ref:`dk_buttons_and_leds_readme` library is used to detect button presses.
 
-The :ref:`Zephyr settings API <zephyr:settings_api>` is used to persistently store the sensor range setting for the temperature sensor, given that :kconfig:option:`CONFIG_BT_SETTING` is enabled.
+The :ref:`Zephyr settings API <zephyr:settings_api>` is used to persistently store the following settings given that :kconfig:option:`CONFIG_BT_SETTING` is enabled:
+
+* The temperature range used in the :c:var:`bt_mesh_sensor_present_dev_op_temp` sensor
+* The presence motion threshold used in the :c:var:`bt_mesh_sensor_presence_detected` sensor
+* The ambient light level gain used in the :c:var:`bt_mesh_sensor_present_amb_light_level` sensor
 
 User interface
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