doc: releases: hawkbit: add infos about changes

add infos about changes and improvements
in the hawkbit subsystem.

Signed-off-by: Fin Maaß <[email protected]>

Author: maass-hamburg

doc/releases/migration-guide-4.1.rst

@@ -596,6 +596,10 @@ Filesystem
 hawkBit
 =======
 
+* The Kconfig symbols :kconfig:option:`CONFIG_SMF` and
+  :kconfig:option:`CONFIG_SMF_ANCESTOR_SUPPORT` are now required to be enabled to use the
+  hawkBit subsystem.
+
 MCUmgr
 ======
 

doc/releases/release-notes-4.1.rst

@@ -140,6 +140,13 @@ New APIs and options
 
 * Management
 
+  * hawkBit
+
+    * The hawkBit subsystem now uses the State Machine Framework internally.
+    * :kconfig:option:`CONFIG_HAWKBIT_TENANT`
+    * :kconfig:option:`CONFIG_HAWKBIT_EVENT_CALLBACKS`
+    * :kconfig:option:`CONFIG_HAWKBIT_SAVE_PROGRESS`
+
   * MCUmgr
 
     * Image management :c:macro:`MGMT_EVT_OP_IMG_MGMT_DFU_CONFIRMED` now has image data field