chore(deps): update postgres:18.6-alpine docker digest to 10a5c69 (#329)

k8s/infra/postgres.yaml

@@ -53,7 +53,7 @@ spec:
     spec:
       containers:
       - name: postgres
-        image: postgres:18.6-alpine@sha256:898c60cb390d1085bc97bdd6a1ae968757421df394b071848b52b1c09c89d6a5
+        image: postgres:18.6-alpine@sha256:10a5c69a83035ab5239f5620d708520e8b28f5aa1f2b20143e6024532edadfb5
         args:
         - -c
         - shared_buffers=384MB