Update docker/login-action action to v4 #111

Job	Run time
Build scip-java CLI	3m 13s
maven-java25-demo	2m 55s
maven-java17-spring-boot	2m 56s
gradle-kotlin-flowext	3m 42s
gradle-java21-readiness	1m 40s
maven-kotlin-json-kotlin-maven	1m 43s
bazel-java-examples	2m 57s
gradle-mixed-okio-jmh	4m 37s
gradle-kotlin-okio	3m 17s
	27m 0s

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