[UPD] addons table in README.md [ci skip]

README.md

@@ -23,7 +23,7 @@ addon | version | summary
 [mail_optional_autofollow](mail_optional_autofollow/) | 9.0.1.0.0 | Choose if you want to automatically add new recipients as followers on mail.compose.message
 [mail_optional_follower_notification](mail_optional_follower_notification/) | 9.0.1.0.0 | Choose if you want to automatically notify followers on mail.compose.message
 [mail_tracking](mail_tracking/) | 9.0.3.0.2 | Email tracking system for all mails sent
-[mail_tracking_mailgun](mail_tracking_mailgun/) | 9.0.1.3.0 | Mail tracking and Mailgun webhooks integration
+[mail_tracking_mailgun](mail_tracking_mailgun/) | 9.0.1.3.1 | Mail tracking and Mailgun webhooks integration
 [mail_tracking_mass_mailing](mail_tracking_mass_mailing/) | 9.0.1.0.0 | Improve mass mailing email tracking
 [mass_mailing_custom_unsubscribe](mass_mailing_custom_unsubscribe/) | 9.0.3.0.0 | Know and track (un)subscription reasons, GDPR compliant
 [mass_mailing_partner](mass_mailing_partner/) | 9.0.1.0.1 | Link partners with mass-mailing