chore(deps): update helm release argo-cd to v7.8.21

Author: renovate[bot]

apps/argocd/kustomization.yaml

@@ -4,7 +4,7 @@ kind: Kustomization
 helmCharts:
   - name: argo-cd
     repo: https://argoproj.github.io/argo-helm
-    version: 7.8.13
+    version: 7.8.21
     releaseName: argocd
     namespace: argocd
     includeCRDs: true

helmfile.yaml

@@ -6,7 +6,7 @@ releases:
   - name: argocd
     namespace: argocd
     chart: argo/argo-cd
-    version: 7.8.13
+    version: 7.8.21
     values:
       - apps/argocd/values.yaml
     strategicMergePatches: