fix: update from upstream

See https://github.com/nrfconnect/sdk-nrf/tree/56186147427304ccdcbe7762becd0fe2ec0a5a89/applications/asset_tracker_v2

Author: github-actions[bot]

doc/asset_tracker_v2_description.rst

@@ -31,7 +31,8 @@ Following are the cloud services that are supported by the application:
 * `AWS IoT Core`_
 * `Azure IoT Hub`_
 * `nRF Cloud`_
-* `LwM2M`_ v1.1 compliant service (for example, `Coiote Device Management`_, `Leshan LwM2M server <Leshan homepage_>`_).
+* `LwM2M`_ v1.1 compliant service (for example, AVSystem's `Coiote Device Management`_, `Leshan LwM2M server <Leshan homepage_>`_).
+  To know more about the AVSystem integration with |NCS|, see :ref:`ug_avsystem`.
 
 To run the application on a development kit and connect to a cloud service, you must complete the following steps:
 

doc/cloud_module.rst

@@ -183,6 +183,8 @@ If not using the default DPS (Device Provisioning Service) host, ensure that the
 
 * :kconfig:option:`CONFIG_AZURE_IOT_HUB_DPS_HOSTNAME`
 
+.. _assettracker_v2_cloudmodule_lwm2m:
+
 Configurations for LwM2M integration layer
 ------------------------------------------