fix the problem that the pin code can be set to other than 6 digits

src/locales/en.js

@@ -311,6 +311,7 @@ export default {
     'Unable to verify': 'Unable to verify',
     'Use a backup code': 'Use a backup code',
     'Use a passcode': 'Use a passcode',
+    'PIN code is invalid': 'PIN code is invalid',
     'PIN code is wrong': 'PIN code is wrong',
     'Sign Up': 'Sign Up',
     'Transaction Details': 'Transaction Details',

src/locales/zh_Hans.js

@@ -311,6 +311,7 @@ export default {
     'Unable to verify': '无法验证',
     'Use a backup code': '使用备用码',
     'Use a passcode': '使用验证码',
+    'PIN code is invalid': 'PIN码无效',
     'PIN code is wrong': 'PIN码错误',
     'Sign Up': '注册',
     'Transaction Details': '交易详情',