docs: fix sync issue by updating README.md logo to use GitHub URL

[lukegalbraithrussell]

Summary

This makes it an external link so we no longer need to host the image, which is creating an issue with the docs syncing.

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.92%. Comparing base (95e061d) to head (d6d8895).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #27      +/-   ##
==========================================
- Coverage   62.95%   62.92%   -0.04%     
==========================================
  Files         210      210              
  Lines       22127    22127              
==========================================
- Hits        13930    13923       -7     
- Misses       7111     7119       +8     
+ Partials     1086     1085       -1     

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[mwbrooks]

✅ Thanks for fixing the sync issue. It's too bad that we can't keep it generic, but that's alright. If we update the logo, we may need to update the URL as well. 🔗

[zimeg]

🤔 Do we want to follow up and remove the .svg from source code too? I think we can checkout one of these earlier commits as needed but I'm not sure that we're referencing it elsewhere

[lukegalbraithrussell]

@zimeg It gets removed in the sync PR