Update Kubernetes and Tekton in dependencies and documentation #2824

Job	Run time
test-docker-build (base)	40s
unit	5m 8s
test-docker-build (git)	1m 19s
test-docker-build (image-processing)	1m 7s
test-docker-build (waiter)	49s
integration (v1.25.11)	26m 12s
integration (v1.28.0)	28m 10s
e2e (v1.25.11)	25m 48s
e2e (v1.28.0)	25m 49s
	1h 55m 2s

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