docs: 修改错别字

[ken678]

错别字

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.49%. Comparing base (b7cad54) to head (a27066f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1011 +/- ## ========================================= Coverage 97.49% 97.49% Complexity 957 957 ========================================= Files 361 361 Lines 6479 6479 ========================================= Hits 6317 6317 Misses 162 162 ```

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