feat(container): update image ghcr.io/onedr0p/postgres-init to v16.8

[renovate]

This PR contains the following updates:

Package	Update	Change
ghcr.io/onedr0p/postgres-init (source)	minor	16.6 -> 16.8

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[github-actions]

--- kubernetes/apps/home-automation/teslamate/app Kustomization: flux-system/teslamate HelmRelease: home-automation/teslamate

+++ kubernetes/apps/home-automation/teslamate/app Kustomization: flux-system/teslamate HelmRelease: home-automation/teslamate

@@ -50,13 +50,13 @@

           init-db:
             envFrom:
             - secretRef:
                 name: teslamate-secret
             image:
               repository: ghcr.io/onedr0p/postgres-init
-              tag: 16.6@sha256:a37bbb04a0ea3f15b505c6f97637e7ae89bc66541ae23b8d3848024087980e76
+              tag: 16.8@sha256:217c47c886965474f5c234b5a35ed008f53b39ea90a3088b31c0da98e1f9284d
     ingress:
       app:
         annotations:
           external-dns.alpha.kubernetes.io/target: internal...PLACEHOLDER_SECRET_DOMAIN..
           gethomepage.dev/app: teslamate
           gethomepage.dev/description: Tesla Analytics

[github-actions]

--- HelmRelease: home-automation/teslamate Deployment: home-automation/teslamate

+++ HelmRelease: home-automation/teslamate Deployment: home-automation/teslamate

@@ -35,13 +35,13 @@

       hostPID: false
       dnsPolicy: ClusterFirst
       initContainers:
       - envFrom:
         - secretRef:
             name: teslamate-secret
-        image: ghcr.io/onedr0p/postgres-init:16.6@sha256:a37bbb04a0ea3f15b505c6f97637e7ae89bc66541ae23b8d3848024087980e76
+        image: ghcr.io/onedr0p/postgres-init:16.8@sha256:217c47c886965474f5c234b5a35ed008f53b39ea90a3088b31c0da98e1f9284d
         name: init-db
       containers:
       - env:
         - name: DISABLE_MQTT
           value: 'false'
         - name: MQTT_HOST