docs: 修复安装方式错误

[zjxxxxxxxxx]

修复了#57

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5d45cd9) 82.33% compared to head (8262aac) 82.47%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #58      +/-   ##
==========================================
+ Coverage   82.33%   82.47%   +0.13%     
==========================================
  Files          29       29              
  Lines         351      348       -3     
  Branches       64       63       -1     
==========================================
- Hits          289      287       -2     
  Misses          1        1              
+ Partials       61       60       -1     

Flag	Coverage Δ
unittests	82.47% <100.00%> (+0.13%)	⬆️

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