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

Author: renovate[bot]

lab/scripts/installer.sh

@@ -20,7 +20,7 @@ yq_version='4.47.2'
 flux_version='2.7.1'
 
 # renovate: depName=argoproj/argo-cd
-argocd_version='2.14.20'
+argocd_version='3.1.8'
 
 # renovate: depName=hashicorp/terraform
 terraform_version='1.13.3'