fix: add missing import

Signed-off-by: Maximilian Deubel <maximilian.deubel@nordicsemi.no>

Author: maxd-nordic

src/nrfcloud_utils/nrf_cloud_diap.py

@@ -6,6 +6,7 @@
 
 import requests
 import coloredlogs, logging
+from nrfcloud_utils import ca_certs
 
 DEV_STAGE_DICT = {'dev':     '.dev.',
                   'beta':    '.beta.',