Update dependency argoproj/argo-cd to v2.8.5

Author: renovate[bot]

argocd/install/kustomization.yaml

@@ -2,7 +2,7 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - https://github.com/argoproj/argo-cd.git/manifests/cluster-install?ref=v2.6.7
+  - https://github.com/argoproj/argo-cd.git/manifests/cluster-install?ref=v2.8.5
 
 ## changes to config maps
 patchesStrategicMerge: