<version> correspond au tag argocd comme v2.6.1

Non-HA

kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/<version>/manifests/install.yaml

HA

kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/<version>/manifests/ha/install.yaml

Source:

https://argo-cd.readthedocs.io/en/stable/operator-manual/upgrading/overview/