Misc fixes for cert commands

data/actionsmap/yunohost.yml

@@ -647,7 +647,7 @@ domain:
                             action: store_true
 
         cert:
-            subcategory_help: Manage domains DNS
+            subcategory_help: Manage domain certificates
             actions:
                 ### certificate_status()
                 status:

data/hooks/conf_regen/01-yunohost

@@ -82,7 +82,7 @@ EOF
   # Cron job that renew lets encrypt certificates if there's any that needs renewal
   cat > $pending_dir/etc/cron.daily/yunohost-certificate-renew << EOF
 #!/bin/bash
-yunohost domain cert-renew --email
+yunohost domain cert renew --email
 EOF
 
   # If we subscribed to a dyndns domain, add the corresponding cron