[nrftoup] docs: guides: update nrfconnect factory data guide

Since the `nrfjprog` tool become deprecated all documents shall mention the `nrfutil device` tool.

Signed-off-by: Michał Szablowski <michal.szablowski@nordicsemi.no>

Author: doublemis1

docs/guides/nrfconnect_factory_data_configuration.md

@@ -358,7 +358,7 @@ To use this script, complete the following steps:
     > `factory_data.hex` and `factory_data.bin` files are created in the
     > `output` directory. The first file contains the required memory offset.
     > For this reason, it can be programmed directly to the device using a
-    > programmer (for example, `nrfjprog`).
+    > programmer (for example, `nrfutil device`).
 
     l. (optional) The maximum partition size in device's NVM memory, where
     factory data will be stored.
@@ -372,7 +372,7 @@ To use this script, complete the following steps:
     > `factory_data.hex` and `factory_data.bin` files are created in the
     > `output` directory. The first file contains the required memory offset.
     > For this reason, it can be programmed directly to the device using a
-    > programmer (for example, `nrfjprog`).
+    > programmer (for example, `nrfutil device`).
 
 4. Run the script using the prepared list of arguments:
 
@@ -766,7 +766,7 @@ $ python scripts/tools/nrfconnect/nrfconnect_generate_partition.py -i build/ligh
 As a result, `factory_data.hex` and `factory_data.bin` files are created in the
 `/build/light_bulb/zephyr/` directory. The first file contains the memory
 offset. For this reason, it can be programmed directly to the device using a
-programmer (for example, `nrfjprog`).
+programmer (for example, `nrfutil device`).
 
 <hr>
 
@@ -901,22 +901,15 @@ achieve the desired behavior of your application.
 ## Programming factory data
 
 The HEX file containing factory data can be programmed into the device's flash
-memory using `nrfjprog` and the J-Link programmer. To do this, use the following
+memory using `nrfutil device` and the J-Link programmer. To do this, use the following
 command:
 
 ```
-$ nrfjprog --program factory_data.hex
+$ nrfutil device program --firmware factory_data.hex
 ```
 
-In this command, you can add the `--family` argument and provide the name of the
-DK: `NRF52` for the nRF52840 DK or `NRF53` for the nRF5340 DK. For example:
-
-```
-$ nrfjprog --family NRF52 --program factory_data.hex
-```
-
-> Note: For more information about how to use the `nrfjprog` utility, visit
-> [Programming SoCs with nrfjprog](https://docs.nordicsemi.com/bundle/ug_nrf_cltools/page/UG/cltools/nrf_nrfjprogexe.html)
+> Note: For more information about how to use the `nrfutil device` utility, visit
+> [Programming SoCs with nrfutil's device module](https://docs.nordicsemi.com/bundle/nrfutil/page/README.html)
 
 Another way to program the factory data to a device is to use the nRF Connect
 platform build system described in