doc: releases: document the DIS changes in changelog and migration guide

Added a changelog entry in the Deprecated and New categories to document
the Kconfig changes for the Bluetooth Device Information Service (DIS).
Updated the migration guide to provide instructions on how to
transition from the old configuration scheme to the new one.

Signed-off-by: Kamil Piszczek <Kamil.Piszczek@nordicsemi.no>

Author: kapi-no

doc/releases/migration-guide-4.1.rst

@@ -587,6 +587,16 @@ Bluetooth Host
 Bluetooth Crypto
 ================
 
+Bluetooth Services
+==================
+
+* The :kconfig:option:`CONFIG_BT_DIS_MODEL` and :kconfig:option:`CONFIG_BT_DIS_MANUF` have been
+  deprecated. Application developers should now use the
+  :kconfig:option:`CONFIG_BT_DIS_MODEL_NUMBER_STR` and
+  :kconfig:option:`CONFIG_BT_DIS_MANUF_NAME_STR` Kconfig options to set the string values in the
+  Model Number String and Manufacturer Name String characteristics that are part of the Device
+  Information Service (DIS).
+
 Networking
 **********
 

doc/releases/release-notes-4.1.rst

@@ -117,6 +117,11 @@ Deprecated APIs and options
 * The TinyCrypt library has been deprecated as the upstream version is no longer maintained.
   PSA Crypto API is now the recommended cryptographic library for Zephyr.
 
+* The :kconfig:option:`CONFIG_BT_DIS_MODEL` and :kconfig:option:`CONFIG_BT_DIS_MANUF` have been
+  deprecated. Application developers can achieve the same configuration by using the new
+  :kconfig:option:`CONFIG_BT_DIS_MODEL_NUMBER_STR` and
+  :kconfig:option:`CONFIG_BT_DIS_MANUF_NAME_STR` Kconfig options.
+
 New APIs and options
 ====================
 
@@ -151,6 +156,16 @@ New APIs and options
     * :c:member:`bt_mesh_health_cli::update` callback can be used to periodically update the message
       published by the Health Client.
 
+  * Services
+
+    * The :kconfig:option:`CONFIG_BT_DIS_MODEL_NUMBER` and
+      :kconfig:option:`CONFIG_BT_DIS_MANUF_NAME` Kconfig options can be used to control the
+      presence of the Model Number String and Manufacturer Name String characteristics inside
+      the Device Information Service (DIS). The :kconfig:option:`CONFIG_BT_DIS_MODEL_NUMBER_STR`
+      and :kconfig:option:`CONFIG_BT_DIS_MANUF_NAME_STR` Kconfig options are now used to set the
+      string values in these characteristics. They replace the functionality of the deprecated
+      :kconfig:option:`CONFIG_BT_DIS_MODEL` and :kconfig:option:`CONFIG_BT_DIS_MANUF` Kconfigs.
+
 * Build system
 
   * Sysbuild