ci: Add Dependabot version-update cooldown (#553) #2980

Job	Run time
build-test-client-windows	14m 47s
build-test	6m 33s
build-test-client-windows-curl	18m 12s
build-test-curl	6m 10s
contract-tests-curl	3m 34s
contract-tests	3m 21s
build-test-client-mac-curl	4m 30s
build-test-client-mac	5m 58s
	1h 3m 5s

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