feat(container)!: Update image postgres ( 16 → 18 )

[renovate]

This PR contains the following updates:

Package	Update	Change
postgres	major	16-alpine -> 18-alpine

---

Configuration

📅 Schedule: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[github-actions]

--- kubernetes/apps/security/authentik/app Kustomization: security/authentik StatefulSet: security/authentik-postgresql

+++ kubernetes/apps/security/authentik/app Kustomization: security/authentik StatefulSet: security/authentik-postgresql

@@ -34,13 +34,13 @@

           valueFrom:
             secretKeyRef:
               key: postgres-password
               name: authentik-secrets
         - name: PGDATA
           value: /var/lib/postgresql/data/pgdata
-        image: postgres:16-alpine
+        image: postgres:18-alpine
         livenessProbe:
           exec:
             command:
             - /bin/sh
             - -c
             - pg_isready -U authentik -d authentik