bug: menu render unexpect when docs dir path include `enum`

Versions

• dumi:1.1.26
• node:14.16.1
• npm:6.14.12
• OS:MacBook Pro (13-inch, M1, 2020)
• Browser:Google Chrome 93.0.4577.63 (arm64)

Steps to reproduce

1. Create a folder named with enum in the docs directory, like this:

docs
├── docs
│   └── enum
│       ├── ListCard.en.md
│       └── ListCard.md
├── index.en.md
└── index.md

With locale config:

locales: [
  ['zh', '中文'],
  ['en', 'English'],
],

2. Click locale bar changing current language, enum menu render error:

Living demo: https://saber2pr-umi.github.io/test-dumi-enum/en/docs/enum/list-card

Demo source code: https://github.com/saber2pr-umi/test-dumi-enum

What is Expected?

• The menu path can contain enum words

• In Chinese, only the Chinese menu is displayed

• In English, only the English menu is displayed

What is actually happening?