doc: nrf: app_dev: bootloaders: Update QSPI XIP split image flash

Updates these instructions to refer to nrfutil instead of nrfjprog

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

doc/nrf/app_dev/bootloaders_dfu/qspi_xip_split_image.rst

@@ -215,10 +215,7 @@ Programming with the QSPI XIP split image
 *****************************************
 
 Programming of the application is supported using the :ref:`standard procedure <programming>`.
-The standard procedure will program the firmware using the default nrfjprog configuration which, for QSPI, is PP4IO mode.
-
-.. note::
-      |nrfjprog_deprecation_note|
+The standard procedure programs the firmware using the default nRF Util configuration, which, for QSPI, is the PP4IO mode.
 
 Programming using a different SPI mode
 ======================================
@@ -233,8 +230,8 @@ To use this file when programming, add the following lines to the application's
 .. code-block:: cmake
 
     macro(app_set_runner_args)
-      # Replace with the filename of your ini file
-      board_runner_args(nrfjprog "--qspiini=${CMAKE_CURRENT_SOURCE_DIR}/Qspi_thingy53.ini")
+      # Replace with the filename of your json file
+      board_runner_args(nrfutil "--ext-mem-config-file=${CMAKE_CURRENT_SOURCE_DIR}/qspi_thingy53.json")
     endmacro()
 
 This will enable programming the target board successfully when using ``west flash``.