Update dependency argoproj-labs/argocd-autopilot to v0.4.20

Author: renovate[bot]

bootstrap/argo-cd/kustomization.yaml

@@ -15,4 +15,4 @@ configMapGenerator:
 kind: Kustomization
 namespace: argocd
 resources:
-  - github.com/argoproj-labs/argocd-autopilot/manifests/base?ref=v0.4.18
+  - github.com/argoproj-labs/argocd-autopilot/manifests/base?ref=v0.4.20