test with JDK 24 and update readme to remove latest tested ver entry #237

Job	Run time
Smoke Test (macos-latest, Java 21)	1m 2s
Smoke Test (bellsoft/liberica-openjdk-alpine:21, Java 21)	1m 27s
Smoke Test (eclipse-temurin:21-jdk-alpine, Java 21)	1m 22s
Smoke Test (azul/zulu-openjdk-alpine:21, Java 21)	1m 25s
Smoke Test (ubuntu-latest, Java 21)	55s
Smoke Test (amazoncorretto:21-alpine, Java 21)	1m 22s
	7m 33s

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