cron: enable import-nvd task again

vulnrichment takes a lot of time to add information about CVEs, so
import secfixes information from NVD to at least have some basic info
about the CVE.

overlay/usr/local/bin/update-secfixes

@@ -7,6 +7,7 @@ echo "$(date "+%Y-%m-%d %H:%M:%S"): Start updating secfixes: $(date)"
 
 cd /home/python/secfixes-tracker
 
+flask import-nvd 2
 secfixes-cli import-vulnrich
 flask import-apkindex
 flask import-secfixes