Docs: Readme

[operagxsasha]

The old license link didn't work

Specific updates (required)

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Does this pull request close any open issues?

Checklist:

• Read the contribution guide
• make runs successfully
• All tests in ./test.sh pass
• README and other documentation updated
• Pending changelog updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.71558%. Comparing base (c5c3e79) to head (dffae63).
Report is 1 commits behind head on master.

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3224         +/-   ##
===================================================
- Coverage   57.40414%   56.71558%   -0.68856%     
===================================================
  Files             92          92                 
  Lines          15856       19693       +3837     
===================================================
+ Hits            9102       11169       +2067     
- Misses          6147        7917       +1770     
  Partials         607         607                 

see 88 files with indirect coverage changes

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see 88 files with indirect coverage changes