chore(deps): update znc docker tag to v1.9.0 (#387)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| znc | minor | `1.8.2` -> `1.9.0` |

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Reviewed-on: https://git.home/nrdufour/home-ops/pulls/387
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kubernetes/main/apps/default/znc/app/deployment.yaml

@@ -22,14 +22,14 @@ spec:
           claimName: znc-pvc
       initContainers:
       - name: init-config
-        image: znc:1.8.2
+        image: znc:1.9.0
         command: ['/bin/sh', '-c', "until [ -f /znc-data/configs/znc.conf ]; do echo waiting for znc.conf; sleep 2; done"]
         volumeMounts:
           - mountPath: /znc-data
             name: znc-config
       containers:
       - name: znc
-        image: znc:1.8.2
+        image: znc:1.9.0
         ports:
         - containerPort: 6667
         volumeMounts: