fix(plugin_test): 使用规范化的名称匹配插件版本号

[he0119]

https://github.com/python-poetry/poetry/blob/96ffd5a28c2fa87b75bb4612c7606502b35c36c7/src/poetry/console/commands/add.py#L386

https://github.com/pypa/packaging/blob/1675b390e49ffff5acab16ee0351e7bc1e113fb0/src/packaging/utils.py#L46-L51

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.51%. Comparing base (745c9b8) to head (b708e8c).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #281      +/-   ##
==========================================
+ Coverage   87.50%   87.51%   +0.01%     
==========================================
  Files          37       37              
  Lines        1992     1994       +2     
==========================================
+ Hits         1743     1745       +2     
  Misses        249      249              

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