doc: Updates to AWS IoT lib docs

NCSDK-28995
* Improve commands on how to install
dependencies and usage of the AWS CLI.
* Improve instructions of AWS IoT setup
for nRF70 Series

Signed-off-by: divya pillai <divya.pillai@nordicsemi.no>

doc/nrf/libraries/networking/aws_iot.rst

@@ -46,6 +46,11 @@ To complete the steps described in this document, make sure that the following p
 
 * Install `AWS Command Line Interface`_ on your system and login as a user with appropriate permissions.
 * To use the ``nrfcredstore`` tool, the dependencies in the :file:`nrf/scripts/requirements-extra.txt` file must be installed.
+ Enter the following commands in a ``cmd.exe`` terminal window in the :file:`ncs` folder to install all the dependencies in the file:
+
+ .. code-block:: console
+
+ pip3 install -r nrf/scripts/requirements-extra.txt
 
 .. rst-class:: numbered-step
 
@@ -58,6 +63,8 @@ Generating and provisioning certificates
 There are multiple ways to generate and register these certificates:
 
 * The device key pair and certificate are generated by AWS and downloaded onto the device.
+* You must configure AWS with the AWS configure command to generate the key pair.
+ See `AWS CLI example`_ for the commands on AWS configuration.
 * The device generates the key pair and a Certificate Signing Request (CSR).
  This request is uploaded to AWS to obtain a device certificate and is used to generate a self-signed device certificate.
 
@@ -188,8 +195,13 @@ There are multiple ways to generate and register these certificates:
 
  #. Take note of the certificate ARN, as it will be required later.
  #. Download the `Amazon Root CA 1`_ PEM file as :file:`ca-cert.pem`.
+ You need to rename the file if it is not saved as a :file:`.pem` file.
  #. Place the PEM files into the folder path specified by the :kconfig:option:`CONFIG_MQTT_HELPER_CERTIFICATES_FOLDER` option, default is :file:`<app_src_dir>/certs/`.
  Ensure that the :kconfig:option:`CONFIG_MQTT_HELPER_PROVISION_CERTIFICATES` option is set.
+
+ .. note::
+ It is not necessary to set the :kconfig:option:`CONFIG_MQTT_HELPER_CERTIFICATES_FOLDER` Kconfig option if the file is placed in a folder named :file:`certs` under the application source directory.
+
  #. If the files are placed correctly, the :ref:`lib_mqtt_helper` library finds the certificates and provisions them to the Mbed TLS stack when connecting to AWS IoT.
 
 .. rst-class:: numbered-step

doc/nrf/links.txt

@@ -1114,6 +1114,7 @@
 .. _`Security best practices in AWS IoT Core`: https://docs.aws.amazon.com/iot/latest/developerguide/security-best-practices.html
 .. _`AWS IoT Core Server Authentication`: https://docs.aws.amazon.com/iot/latest/developerguide/server-authentication.html
 .. _`CA certificates for server authentication in AWS IoT Core`: https://docs.aws.amazon.com/iot/latest/developerguide/server-authentication.html#server-authentication-certs
+.. _`AWS CLI example`: https://docs.aws.amazon.com/cli/latest/reference/configure/#examples
 
 .. _`AWS IoT console`: https://console.aws.amazon.com/iot/home
 .. _`AWS S3 console`: https://console.aws.amazon.com/s3/home