Move README to v1beta1 #3188

Job	Run time
e2e (v1.27.11)	25m 50s
e2e (v1.27.11)	25m 50s
e2e (v1.29.2)	27m 15s
e2e (v1.29.2)	27m 15s
integration (v1.27.11)	19m 53s
integration (v1.27.11)	20m 0s
integration (v1.29.2)	19m 56s
integration (v1.29.2)	19m 56s
test-docker-build (base)	1m 6s
test-docker-build (base)	1m 6s
test-docker-build (git)	1m 6s
test-docker-build (git)	1m 6s
unit	2m 48s
unit	2m 48s
test-docker-build (image-processing)	48s
test-docker-build (image-processing)	48s
test-docker-build (waiter)	35s
test-docker-build (waiter)	35s
	3h 18m 41s

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