doc: Releases: Add notes about deprecated bt_ctlr_set_public_addr

The function has been marked for deprecation.
Add entries in the release notes and migration guide.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

doc/releases/migration-guide-4.3.rst

@@ -125,6 +125,9 @@ Bluetooth Controller
     * :kconfig:option:`CONFIG_BT_CTRL_ADV_ADI_IN_SCAN_RSP` to
       :kconfig:option:`CONFIG_BT_CTLR_ADV_ADI_IN_SCAN_RSP`
 
+   * :c:func:`bt_ctlr_set_public_addr` is deprecated. To set the public Bluetooth device address,
+     sending a vendor specific HCI command with :c:struct:`bt_hci_cp_vs_write_bd_addr` can be used.
+
 .. zephyr-keep-sorted-start re(^\w)
 
 Bluetooth Audio

doc/releases/release-notes-4.3.rst

@@ -74,6 +74,9 @@ Deprecated APIs and options
 
 * :kconfig:option:`CONFIG_POSIX_READER_WRITER_LOCKS` is deprecated. Use :kconfig:option:`CONFIG_POSIX_RW_LOCKS` instead.
 
+* :c:func:`bt_ctlr_set_public_addr` is deprecated in favor of using
+  :c:struct:`bt_hci_cp_vs_write_bd_addr` for setting the public Bluetooth device address.
+
 New APIs and options
 ====================