feat(container): update image ghcr.io/koenkk/zigbee2mqtt ( 2.7.2 ➔ 2.9.1 ) (#520)

| datasource | package                    | from  | to    |
| ---------- | -------------------------- | ----- | ----- |
| docker     | ghcr.io/koenkk/zigbee2mqtt | 2.7.2 | 2.9.1 |

Co-authored-by: mortyops[bot] <224312435+mortyops[bot]@users.noreply.github.com>

Author: mortyops[bot]

kubernetes/apps/home-automation/zigbee2mqtt/app/helmrelease.yaml

@@ -30,7 +30,7 @@ spec:
           app:
             image:
               repository: ghcr.io/koenkk/zigbee2mqtt
-              tag: 2.7.2
+              tag: 2.9.1
             env:
               Z2M_WATCHDOG: default
               ZIGBEE2MQTT_DATA: /data