fixed typo

Author: gionniboy

bin/v-add-mail-domain-dkim

@@ -81,7 +81,7 @@ fi
 
 # Adding dkim in config
 update_object_value 'mail' 'DOMAIN' "$domain" '$DKIM' 'yes'
-increase_user_value "$user" '$U_MAIL_DKMI'
+increase_user_value "$user" '$U_MAIL_DKIM'
 
 # Logging
 log_history "enabled DKIM support for $domain"