Update module github.com/argoproj/argo-cd/v2 to v2.1.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/argoproj/argo-cd/v2	require	patch	v2.1.5 -> v2.1.6

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Release Notes

argoproj/argo-cd

v2.1.6

Compare Source

Quick Start

Non-HA:

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/v2.1.6/manifests/install.yaml

HA:

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/v2.1.6/manifests/ha/install.yaml

Bug Fixes

• fix: don't use revision caching during app creation (#​7508)
• fix: supporting OCI dependencies. Fixes #​6062 (#​6994)

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