chore(deps): update helm release postgresql to v18

Author: renovate[bot]

pretix-helm/Chart.lock

@@ -1,9 +1,9 @@
 dependencies:
 - name: postgresql
   repository: https://charts.bitnami.com/bitnami
-  version: 16.7.27
+  version: 18.1.11
 - name: redis
   repository: https://charts.bitnami.com/bitnami
   version: 19.6.4
-digest: sha256:2d3aaa21f018ea007f098d99541123a8ddf0419c3ea5eb82cdaa735bc2b87b62
-generated: "2025-09-20T14:16:30.047125434Z"
+digest: sha256:fddf0c4a870be7564bfe207cc7041d354a6e642ab42cb2effdb8fc0eeba0bbf3
+generated: "2025-11-20T09:07:25.433123505Z"

pretix-helm/Chart.yaml

@@ -8,7 +8,7 @@ keywords:
   - event-tickets
 dependencies:
   - name: postgresql
-    version: "16.7.27"
+    version: "18.1.11"
     repository: "https://charts.bitnami.com/bitnami"
     condition: postgresql.enabled
   - name: redis