fix lint

Author: labuladong

pulsaradmin/pkg/admin/brokers_test.go

@@ -130,6 +130,7 @@ func TestUpdateDynamicConfigurationWithCustomURL(t *testing.T) {
 		RawPath: "/admin/v2/brokers/configuration/allowAutoSubscriptionCreation/" + encoded,
 	})
 	assert.NoError(t, err)
+	defer resp.Body.Close()
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
 
 	// get the config, check if it's updated