Bump rollup from 4.21.2 to 4.23.0 in /nflow-explorer #662

Job	Run time
build-and-test-nflow-explorer	50s
build-and-test (17)	1m 10s
build-and-test (21)	1m 13s
build-and-test (22)	1m 8s
javadoc-spotbugs-codeql	3m 55s
integration-tests (17, h2)	3m 42s
integration-tests (17, mariadb)	4m 23s
integration-tests (17, postgresql)	4m 13s
integration-tests (17, mysql)	4m 30s
integration-tests (17, sqlserver)	4m 56s
integration-tests (17, db2)	5m 50s
integration-tests (17, oracle)	5m 10s
integration-tests (21, h2)	3m 51s
integration-tests (21, mariadb)	4m 23s
integration-tests (21, postgresql)	4m 15s
integration-tests (21, mysql)	4m 30s
integration-tests (21, sqlserver)	5m 1s
integration-tests (21, db2)	6m 17s
integration-tests (21, oracle)	5m 8s
	1h 14m 25s

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