net: lib: nrf_cloud: Fix truncated message

To avoid missing part of the download complete message, it should
be moved after the mutex call.

Signed-off-by: Pascal Hernandez <[email protected]>

Author: pascal-nordic

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

@@ -637,7 +637,7 @@ Libraries for networking
 * Deprecated the :ref:`lib_nrf_cloud_rest` library.
   Use the :ref:`lib_nrf_cloud_coap` library instead.
 
-* Fixed occasional message truncation that notified that the download was complete in the :ref:`lib_nrf_cloud_fota` library.
+* Fixed occasional message truncation notifying that the download was complete in the :ref:`lib_nrf_cloud_fota` library.
 
 Libraries for NFC
 -----------------