[Mailer][Notifier] Sweego is backing their bridges, thanks to them!

README.md

@@ -64,6 +64,15 @@ $email = (new TemplatedEmail())
 $mailer->send($email);
 ```
 
+Sponsor
+-------
+
+The Mailer component for Symfony 7.2 is [backed][1] by:
+
+ * [Sweego][2], a European email and SMS sending platform for developers and product builders. Easily create, deliver, and monitor your emails and notifications.
+
+Help Symfony by [sponsoring][3] its development!
+
 Resources
 ---------
 
@@ -72,3 +81,7 @@ Resources
  * [Report issues](https://github.com/symfony/symfony/issues) and
    [send Pull Requests](https://github.com/symfony/symfony/pulls)
    in the [main Symfony repository](https://github.com/symfony/symfony)
+
+[1]: https://symfony.com/backers
+[2]: https://www.sweego.io/
+[3]: https://symfony.com/sponsor