chore(kube): bump stalwartlabs/stalwart Docker tag to v0.16.21

kubernetes/infrastructure/mail/stalwart/values.yaml

@@ -7,7 +7,7 @@
 # Container image
 image:
     repository: stalwartlabs/stalwart
-    tag: v0.16.20
+    tag: v0.16.21
     pullPolicy: IfNotPresent
 # Single-node RocksDB deployment.
 replicaCount: 1

kubernetes/system/kyverno/release.yaml

@@ -12,7 +12,7 @@ spec:
         name: kyverno
         namespace: kyverno
       chart: kyverno
-      version: '3.9.1'
+      version: '3.9.0'
       interval: 5m
   # Minimal footprint for a single-node cluster:
   #  - admissionReports disabled (no extra Redis/Postgres)