chore(deps): update postgres:18.6-alpine docker digest to 83148c0

k8s/infra/postgres.yaml

@@ -53,7 +53,7 @@ spec:
     spec:
       containers:
       - name: postgres
-        image: postgres:18.6-alpine@sha256:77f585114c32fbca283dc835b0596f4e52b51b4c6662d7810b2f4084f60a1873
+        image: postgres:18.6-alpine@sha256:83148c0bc09eac4d598b70a61e1404d0212b76c95c504bfd6c81a4c59ec91792
         args:
         - -c
         - shared_buffers=384MB