chore(deps): update helm release external-secrets to v2

manifests/artemis/external-secrets/kustomization.yaml

@@ -10,6 +10,6 @@ resources:
 helmCharts:
   - name: external-secrets
     repo: https://charts.external-secrets.io/
-    version: 1.2.0
+    version: 2.1.0
     releaseName: external-secrets
     namespace: external-secrets

manifests/artemis/mailu/kustomization.yaml

@@ -10,7 +10,7 @@ resources:
 helmCharts:
   - name: mailu
     repo: https://mailu.github.io/helm-charts/
-    version: 2.6.3
+    version: 2.1.2
     releaseName: mailu
     namespace: mailu
     valuesFile: values.yaml