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

manifests/artemis/mailu/values.yaml

@@ -1350,11 +1350,11 @@ postfix:
   ##     my_variable = my_value
   overrides:
     postfix.cf: |
+      inet_protocols = ipv4
+      smtp_address_preference = ipv4
       smtpd_helo_restrictions = reject_unknown_helo_hostname
       smtpd_sender_restrictions = reject_unknown_sender_domain
       smtpd_client_restrictions = permit_mynetworks
-      smtp_data_restrictions = reject_unauth_pipelining
-      smtp_relay_restrictions = permit_sasl_authenticated, reject_unauth_destination
       smtpd_relay_restrictions = permit_sasl_authenticated, reject_unauth_destination
       smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination
 

manifests/artemis/nextcloud/kustomization.yaml

@@ -10,7 +10,7 @@ resources:
 helmCharts:
   - name: nextcloud
     repo: https://nextcloud.github.io/helm/
-    version: 8.9.1
+    version: 8.5.2
     releaseName: nextcloud
     namespace: nextcloud
     valuesFile: values.yaml