Fix README cloning url

[andreaso]

GitHub does, for good reasons, no longer support the git:https:// protocol.

https://github.blog/2021-09-01-improving-git-protocol-security-github/#no-more-unauthenticated-git

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (0569c89) 95.01% compared to head (f57b806) 94.94%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1508      +/-   ##
==========================================
- Coverage   95.01%   94.94%   -0.08%     
==========================================
  Files          45       45              
  Lines        7550     7550              
==========================================
- Hits         7174     7168       -6     
- Misses        376      382       +6     

see 3 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tomMoral]

Thanks for the fix! merging.

[andreaso]

No problem!

On a similar note, the documentation contains a bunch of http:https:// urls, where it probably would preferable to use the https:// versions instead.

Would a PR rectifying that be welcomed?

[tomMoral]

Yes! :)