Failed to `pixi config set mirrors` in Windows Terminal

[AlphonseZetta10]

Checks

• [X] I have checked that this issue has not already been reported.

• [X] I have confirmed this bug exists on the latest version of pixi, using pixi --version.

Reproducible example

pixi config set --global mirrors '{"https://conda.anaconda.org/": ["https://prefix.dev/conda-forge"]}'

Just like what manual said

OS: Windows 10 19044.4651 Terminal: Windows Terminal

Issue description

PS *** > pixi config set --global mirrors '{"https://conda.anaconda.org/": ["https://prefix.dev/conda-forge"]}'
  × key must be a string at line 1 column 2

Expected behavior

write the mirror setting into global config located in %USERPROFILE%/.pixi