Update dependency com.diffplug.spotless to v8.8.0 #50

Job	Run time
Build scip-java CLI	4m 13s
gradle-kotlin-okio	4m 18s
bazel-java-examples	2m 23s
maven-java25-demo	2m 37s
maven-java17-spring-boot	2m 51s
gradle-mixed-okio-jmh	4m 26s
maven-kotlin-json-kotlin-maven	2m 37s
gradle-kotlin-flowext	3m 42s
gradle-java21-readiness	2m 50s
	29m 57s

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