chore: deps(helmfile): update "postgresql" Helm Chart version to 18.5.18

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Author: updateclibot[bot]

helmfile.d/udash.yaml

@@ -8,7 +8,7 @@ releases:
   - name: postgresql
     namespace: udash
     chart: bitnami/postgresql
-    version: 18.5.17
+    version: 18.5.18
     secrets:
       - ../secrets.d/udash/postgresql.yaml
     wait: true