chore(deps): update dependency argoproj/argo-cd to v3.1.8

Author: renovate[bot]

common/argocd/vault-argocd/kustomization.yaml

@@ -2,7 +2,7 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - https://github.com/argoproj/argo-cd//manifests/cluster-install?ref=v3.0.5
+  - https://github.com/argoproj/argo-cd//manifests/cluster-install?ref=v3.1.8
   - cmp-plugin.yaml
 
 patchesStrategicMerge: