Update ghcr.io/sredevopsorg/ghost-on-kubernetes Docker tag to v6.22.0

Author: renovate[bot]

cluster/apps/ghost/06-ghost-deployment.yaml

@@ -91,7 +91,7 @@ spec:
 
       containers:
       - name: ghost-k8s
-        image: ghcr.io/sredevopsorg/ghost-on-kubernetes:v6.19.3
+        image: ghcr.io/sredevopsorg/ghost-on-kubernetes:v6.22.0
         imagePullPolicy: Always
         ports:
         - name: ghk8s