favicon didn't respect **base** config

[casyalex]

Describe the bug

As screenshot shows, even set base config, favicon ignore this setting.
And when it seems working fine in dev env. But broke in deploy env.

Reproduction

Just start a random project with base config

Expected behavior

favicon url should respect base config

System Info

System:
    OS: macOS 12.4
    CPU: (8) x64 Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz
    Memory: 145.51 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.14.2 - ~/.nvm/versions/node/v16.14.2/bin/node
    Yarn: 1.22.17 - ~/.yarn/bin/yarn
    npm: 8.5.5 - ~/.config/yarn/global/node_modules/.bin/npm
  Browsers:
    Chrome: 102.0.5005.115
    Firefox: 89.0
    Safari: 15.5
  npmPackages:
    vitepress: ^1.0.0-alpha.2 => 1.0.0-alpha.2

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[brc-dd]

We don't add favicon. You need to manually specify it. Refer #320 (comment). You're seeing that request (/favicon.ico) because that's what most browsers search for by default, but it can be overridden as shown in that comment.