[FLINK-34516] Use new CheckpointingMode in flink-core in doc #24

Job	Run time
Pre-compile Checks / Basic QA	6m 33s
Default (Java 8) / Compile	9m 54s
Default (Java 8) / Test packaging/licensing	28m 52s
Default (Java 8) / E2E (group 1)	1h 41m 39s
Default (Java 8) / Test (module: core)	34m 18s
Default (Java 8) / E2E (group 2)	1h 58m 6s
Default (Java 8) / Test (module: python)	16m 40s
Default (Java 8) / Test (module: table)	34m 49s
Default (Java 8) / Test (module: connect)	18m 2s
Default (Java 8) / Test (module: tests)	46m 4s
Default (Java 8) / Test (module: misc)	44m 27s
	7h 39m 24s

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