fix: doc

[Creabine]

Before submitting a pull request, please make sure the following is done...

• Ensure the pull request title and commit message follow the Commit Specific in English.
• Fork the repo and create your branch from master or formily_next.
• If you've added code that should be tested, add tests!
• If you've changed APIs, update the documentation.
• Ensure the test suite passes (npm test).
• Make sure your code lints (npm run lint) - we've done our best to make sure these rules match our internal linting guidelines.

Please do not delete the above content

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What have you changed?

飞猪 重复了两次，删掉一个

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #3280 (c3e3386) into formily_next (edf7a9f) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff              @@
##           formily_next    #3280   +/-   ##
=============================================
  Coverage         96.13%   96.13%           
=============================================
  Files               152      152           
  Lines              6580     6580           
  Branches           1834     1834           
=============================================
  Hits               6326     6326           
  Misses              225      225           
  Partials             29       29           

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