i have a Spring Boot app that is using jdk 21. it works fine locally. but on Railway my build fails with error Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:compile (default-compile) on project content-calendar: Fatal error compiling: error: release version 21 not supported -> [Help 1]. I would like to know which java versions are supported on Railway.

To reproduce, try building a project with jdk 21 on railway.

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