Add Java 25 support #30

Job	Run time
Build scip-java CLI	5m 21s
gradle-kotlin-okio	4m 29s
maven-java17-spring-boot	2m 38s
gradle-kotlin-flowext	3m 53s
maven-kotlin-json-kotlin-maven	2m 30s
gradle-java21-readiness	1m 36s
bazel-java-examples	2m 45s
gradle-mixed-okio-jmh	4m 25s
	27m 37s

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