Update the list of sponsors for Symfony 6.4 🙏

Author: nicolas-grekas

README.md

@@ -7,15 +7,7 @@ Symfony full-stack framework.
 Sponsor
 -------
 
-The FrameworkBundle for Symfony 6.3 is [backed][1] by [alximy][2].
-
-A team of passionate humans from very different backgrounds, sharing their love of
-PHP, Symfony and its ecosystem. Their CTO, Expert developers, tech leads, can help
-you learn or develop the tools you need, and perform audits or tailored workshops.
-They value contributing to the Open Source community and are willing to mentor new
-contributors in their team or yours.
-
-Help Symfony by [sponsoring][3] its development!
+Help Symfony by [sponsoring][1] its development!
 
 Resources
 ---------
@@ -25,6 +17,4 @@ Resources
    [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://alximy.io/
 [3]: https://symfony.com/sponsor