chore(deps): update helm release mailu to v2.6.3

manifests/artemis/mailu/kustomization.yaml

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

manifests/artemis/vaultwarden/kustomization.yaml

@@ -7,7 +7,7 @@ metadata:
 helmCharts:
   - name: vaultwarden
     repo: https://guerzon.github.io/vaultwarden/
-    version: 0.35.1
+    version: 0.34.4
     releaseName: vaultwarden
     namespace: vaultwarden
     valuesFile: values.yaml