MOSIP-34016 Corrected readme for java 21 (#1546) #429

Job	Run time
build-maven-authentication-demo-service / maven-build	1m 16s
build-maven-apitest-commons / maven-build	3m 50s
sonar_analysis-authentication-demo-service / maven-sonar-analysis	1m 37s
sonar_analysis / maven-sonar-analysis	4m 1s
publish_to_nexus / publish-to-nexus	3m 32s
	14m 16s

Provide feedback