applications: nrf_desktop: Document HID subscription improvements

Change adds release note for HID subscription improvements in HIDS and
USB state modules.

Jira: NCSDK-34349

Signed-off-by: Marek Pieta <[email protected]>
Signed-off-by: Anna Wojdylo <[email protected]>

Author: MarekPieta

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -309,6 +309,9 @@ nRF Desktop
     The options are no longer explicitly set in application configurations.
   * Increased the default first HID report delay (:ref:`CONFIG_DESKTOP_HIDS_FIRST_REPORT_DELAY <config_desktop_app_options>`) for keyboard (:ref:`CONFIG_DESKTOP_PERIPHERAL_TYPE_KEYBOARD <config_desktop_app_options>`) in :ref:`nrf_desktop_hids` from ``500 ms`` to ``1000 ms``.
     This change ensures that queued keypresses are not lost when reconnecting with the nRF Desktop dongle.
+  * Improved HID subscription handling in the HID transports (:ref:`nrf_desktop_hids` and :ref:`nrf_desktop_usb_state`).
+    Both HID transports now unsubscribe from HID input reports related to the previously used HID protocol mode before subscribing to HID input reports related to the new HID protocol mode.
+    This change ensures that subscriptions to both HID boot and HID report protocol mode are not enabled at the same time.
 
 nRF Machine Learning (Edge Impulse)
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