Update docker.io/library/postgres Docker tag to v17

tests/manual/wc/postgres.yaml

@@ -67,7 +67,7 @@ spec:
       - name: postgres
         # 13 because 14 does not work yet
         # https://github.com/Kong/kong/issues/8259
-        image: docker.io/library/postgres:13.9-alpine
+        image: docker.io/library/postgres:17.0-alpine
         ports:
           - containerPort: 5432
             protocol: TCP