docs: fix readme

[chenxsan]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

Currently it shows:

As you can see, there's no <link> at all.

Breaking Changes

No.

Additional Info

[snitin315]

Thanks

[codecov]

Codecov Report

Merging #809 (1c40c79) into master (96981fe) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #809   +/-   ##
=======================================
  Coverage   92.11%   92.11%           
=======================================
  Files           6        6           
  Lines         710      710           
  Branches      171      171           
=======================================
  Hits          654      654           
  Misses         53       53           
  Partials        3        3           

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