Update ghcr.io/nodebb/nodebb Docker tag to v4.6

Author: renovate[bot]

apps/nodebb/templates/deployment.yaml

@@ -42,7 +42,7 @@ spec:
             - mountPath: /data/plugins
               name: plugins
       containers:
-        - image: ghcr.io/nodebb/nodebb:4.5
+        - image: ghcr.io/nodebb/nodebb:4.6
           imagePullPolicy: Always
           name: nodebb
           volumeMounts: