samples: matter: Fix nRF54L15 internal build docs.

* Updated a command for building the internal configuration
dedicated to nRF54l15.
* Added a command for building this configuration in the release
configuration as well.
Updated prj_release config file to allow building the internal
release configuration.

Signed-off-by: Arkadiusz Balys <[email protected]>

Author: ArekBalysNordic

doc/nrf/releases_and_maturity/known_issues.rst

@@ -498,6 +498,19 @@ The issues in this section are related to the :ref:`ug_matter` protocol.
 
 .. rst-class:: v2-9-0
 
+KRKNWK-19846: Wrong command for the internal configuration build in the :ref:`matter_template_sample` sample documentation
+  There is an obsolete and wrong command for building the sample for the nRF54L15 DK with support for Matter OTA DFU and DFU over Bluetooth SMP, and using internal MRAM only.
+
+  **Affected platforms:** nRF54L15
+
+  **Workaround:** Use the following command to build the sample for the nRF54L15 DK with support for Matter OTA DFU and DFU over Bluetooth SMP, and using internal MRAM only:
+
+  .. code-block:: console
+
+    west build -p -b nrf54l15dk/nrf54l15/cpuapp -- -DCONFIG_CHIP_DFU_OVER_BT_SMP=y -DFILE_SUFFIX=internal
+
+.. rst-class:: v2-9-0
+
 KRKNWK-19826: The Device Firmware Upgrade (DFU) fails for nRF5340 DK with RAM power down enabled
   The DFU fails for nRF5340 DK, if the application enables the :kconfig:option:`CONFIG_RAM_POWER_DOWN_LIBRARY` Kconfig option.
   This option is enabled by default for the ``release`` configuration of the following samples:

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -340,7 +340,7 @@ Keys samples
 Matter samples
 --------------
 
-|no_changes_yet_note|
+* Updated the :ref:`matter_template_sample` sample document with the instructions on how to build the sample on the nRF54L15 DK with support for Matter OTA DFU and DFU over Bluetooth SMP, and using internal MRAM only.
 
 Networking samples
 ------------------

samples/matter/template/README.rst

@@ -143,7 +143,13 @@ The following is an example command to build the sample on the nRF54L15 DK with
 
 .. code-block:: console
 
-    west build -p -b nrf54l15dk/nrf54l15/cpuapp -- -DCONFIG_CHIP_DFU_OVER_BT_SMP=y -DPM_STATIC_YML_FILE=pm_static_nrf54l15dk_nrf54l15_cpuapp_internal.yml -Dmcuboot_EXTRA_CONF_FILE=<absolute_path_to_the_template_sample>/sysbuild/mcuboot/boards/nrf54l15dk_nrf54l15_cpuapp_internal.conf -Dmcuboot_EXTRA_DTC_OVERLAY_FILE=<absolute_path_to_the_template_sample>/sysbuild/mcuboot/boards/nrf54l15dk_nrf54l15_cpuapp_internal.overlay
+    west build -p -b nrf54l15dk/nrf54l15/cpuapp -- -DCONFIG_CHIP_DFU_OVER_BT_SMP=y -DFILE_SUFFIX=internal
+
+To build the sample for the same purpose, but in the ``release`` configuration, use the following command:
+
+.. code-block:: console
+
+    west build -p -b nrf54l15dk/nrf54l15/cpuapp -- -DCONFIG_CHIP_DFU_OVER_BT_SMP=y -DFILE_SUFFIX=internal -Dtemplate_EXTRA_CONF_FILE=prj_release.conf
 
 Note that in this case, the size of the application partition is half of what it would be when using a configuration with external flash memory support.
 

samples/matter/template/prj_release.conf

@@ -37,6 +37,7 @@ CONFIG_RESET_ON_FATAL_ERROR=y
 CONFIG_USE_SEGGER_RTT=n
 CONFIG_SHELL=n
 CONFIG_OPENTHREAD_SHELL=n
+CONFIG_CHIP_LIB_SHELL=n
 CONFIG_CONSOLE=n
 CONFIG_UART_CONSOLE=n
 CONFIG_SERIAL=n