Chore(deps-dev): Bump org.mockito:mockito-core from 5.20.0 to 5.21.0 #4779

Job	Run time
build-only (Java 17)	47s
site (Java 17)	1m 16s
build-and-test Bridged (Java 17)	12m 20s
test (ubuntu, Java 21)	12m 18s
test (windows, Java 17)	10m 31s
test Java 11 (no-build)	1m 13s
test (windows, Java 21)	11m 30s
test (ubuntu, Java 17)	12m 13s
codecov-upload (Upload to codecov.io)	14s
	1h 2m 22s

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