nrf_modem: update changelog and documentation

* Update changelog to include the latest additions, including DECT clock
  synchronization.
* Added entry for clock sync in the api.rst file.
* Corrected mismatch in function param names in the
  nrf_modem_dect_clock_sync header.

Signed-off-by: Håvard Vermeer <[email protected]>

Author: nordic-hani

nrf_modem/doc/CHANGELOG.rst

@@ -20,6 +20,14 @@ Core library
 DECT NR+
 ========
 
+* Added the DECT clock synchronization API for precise timing with external 1 PPS signals. See the :ref:`nrf_modem_dect_clock_sync` for more information.
+
+  * The :c:func:`nrf_modem_dect_clock_sync_enable` and :c:func:`nrf_modem_dect_clock_sync_disable` functions to control external clock synchronization.
+  * The :c:func:`nrf_modem_dect_clock_sync_get_pulse_info` function to query synchronization pulse timing.
+  * The :c:func:`nrf_modem_dect_clock_sync_get_state` function to retrieve synchronization status and accuracy.
+  * The :c:func:`nrf_modem_dect_clock_sync_enable_ref_output` and :c:func:`nrf_modem_dect_clock_sync_disable_ref_output` functions to control reference signal output on the **COEX1** pin.
+  * The :c:func:`nrf_modem_dect_clock_sync_event_handler_set` function to set the event handler for asynchronous operations.
+
 * Added:
 
   * The :c:func:`nrf_modem_dect_phy_test_rf_tx_cw_control` function to control continuous wave transmission for device certification purposes.

nrf_modem/doc/api.rst

@@ -172,6 +172,13 @@ DECT NR+ PHY API
 
 .. doxygengroup:: nrf_modem_dect_phy
 
+.. _nrf_modem_dect_clock_sync:
+
+DECT clock sync API
+===================
+
+.. doxygengroup:: nrf_modem_dect_clock_sync
+
 .. _nrf_modem_gnss_api:
 
 GNSS API

nrf_modem/include/nrf_modem_dect_clock_sync.h

@@ -298,7 +298,7 @@ int nrf_modem_dect_clock_sync_disable(void);
  * Completion of this operation is indicated by the
  * @ref NRF_MODEM_DECT_CLOCK_SYNC_EVT_PULSE_INFO event.
  *
- * @param pulse_direction Direction of the pulse to query information about.
+ * @param direction Direction of the pulse to query information about.
  *
  * @retval 0           Request was sent to modem.
  * @retval -NRF_EPERM  The Modem library is not initialized.