ble-nordic-uart-service: rename directory

This follows the pattern of other ble service directories.

src/error-log/sagas.test.ts

@@ -2,8 +2,8 @@
 // Copyright (c) 2020 The Pybricks Authors
 
 import { AsyncSaga } from '../../test';
+import { didFailToWrite } from '../ble-nordic-uart-service/actions';
 import { eventProtocolError } from '../ble-pybricks-service/actions';
-import { didFailToWrite } from '../ble-uart/actions';
 import {
     BleDeviceFailToConnectReasonType,
     didFailToConnect as bleDidFailToConnect,

src/error-log/sagas.ts

@@ -2,11 +2,14 @@
 // Copyright (c) 2020-2021 The Pybricks Authors
 
 import { takeEvery } from 'typed-redux-saga/macro';
+import {
+    BleUartActionType,
+    BleUartDidFailToWriteAction,
+} from '../ble-nordic-uart-service/actions';
 import {
     BlePybricksServiceEventActionType,
     BlePybricksServiceEventProtocolErrorAction,
 } from '../ble-pybricks-service/actions';
-import { BleUartActionType, BleUartDidFailToWriteAction } from '../ble-uart/actions';
 import {
     BleDeviceActionType,
     BleDeviceDidFailToConnectAction,