Update rfc for the livestate feature (#5448) #1290

Job	Run time
artifacts (ghcr.io/pipe-cd, helloworld)	7m 0s
artifacts (ghcr.io/pipe-cd, launcher)	8m 51s
artifacts (ghcr.io/pipe-cd, launcher-okd)	8m 47s
artifacts (ghcr.io/pipe-cd, pipecd)	20m 0s
artifacts (ghcr.io/pipe-cd, piped)	19m 7s
artifacts (ghcr.io/pipe-cd, piped-okd)	19m 29s
artifacts (ghcr.io/pipe-cd, pipectl)	7m 19s
artifacts (gcr.io/pipecd, helloworld)	7m 6s
artifacts (gcr.io/pipecd, launcher)	9m 9s
artifacts (gcr.io/pipecd, piped)	19m 50s
release-quickstart-manifests	0s
	2h 6m 38s

Provide feedback