docs: delete duplicate entry in example Role (#14132) #3326

Job	Run time
Build & push windows	18m 30s
Build & push linux (linux/amd64, workflow-controller)	3m 28s
Build & push linux (linux/amd64, argocli)	5m 8s
Build & push linux (linux/amd64, argoexec)	4m 23s
Build & push linux (linux/arm64, workflow-controller)	31m 19s
Build & push linux (linux/arm64, argocli)	46m 29s
Build & push linux (linux/arm64, argoexec)	37m 52s
Push manifest with all images	1m 1s
Try pulling windows	22s
Try pulling linux/amd64 (linux/amd64, workflow-controller)	11s
Try pulling linux/amd64 (linux/amd64, argocli)	12s
Try pulling linux/amd64 (linux/amd64, argoexec)	11s
publish-release	17m 27s
	2h 46m 33s

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