fix config alias err

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 85.01%. Comparing base (c50243c) to head (ade994c). Report is 3 commits behind head on main.

Files	Patch %	Lines
nonebot_bison/plugin_config.py	60.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #580 +/- ## ========================================== + Coverage 84.76% 85.01% +0.25% ========================================== Files 81 88 +7 Lines 3997 4491 +494 ========================================== + Hits 3388 3818 +430 - Misses 609 673 +64 ``` | [Flag](https://app.codecov.io/gh/MountainDash/nonebot-bison/pull/580/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MountainDash) | Coverage Δ | | |---|---|---| | [smoke-test](https://app.codecov.io/gh/MountainDash/nonebot-bison/pull/580/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MountainDash) | `85.01% <60.00%> (+0.25%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MountainDash#carryforward-flags-in-the-pull-request-comment) to find out more.

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[AzideCupric]

你的单测在哪里！让他上前来