https://spring.io/blog/2022/01/20/spring-boot-2-5-9-available-now/

On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 2.5.9 has been released and is now available from Maven Central.
This release includes 32 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with issue reports and pull requests.
If you're interested in helping out, check out the "ideal for contribution" tag in the issue repository. If you have general questions, please ask on stackoverflow.com using the spring-boot tag or chat with the community on Gitter.
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