refactor : Update cnf doc link to k8s doc link #1424

Job	Run time
build-image-for-qe	2m 26s
qe-testing (accesscontrol)	19m 18s
qe-testing (affiliatedcertification)	6m 34s
qe-testing (manageability)	6m 44s
qe-testing (networking)	18m 53s
qe-testing (lifecycle)	21m 15s
qe-testing (performance)	9m 53s
qe-testing (platformalteration)	7m 54s
qe-testing (observability)	9m 45s
qe-testing (operator)	4m 47s
	1h 47m 29s

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