docs: add ICP license

[chenjiahan]

Add ICP license to allow Chinese domains.

• https://en.wikipedia.org/wiki/ICP_license#:~:text='ICP%20registration%2Ffiling')%20is,Baidu%20ICP%20license%20of%20WeChat.
• Gitee 文档站下线通知 & 解决方法 #12846

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.67%. Comparing base (c56337e) to head (5434cce).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12893      +/-   ##
==========================================
- Coverage   89.70%   89.67%   -0.03%     
==========================================
  Files         257      257              
  Lines        6957     6957              
  Branches     1711     1711              
==========================================
- Hits         6241     6239       -2     
- Misses        381      383       +2     
  Partials      335      335              

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