Bump to Swift 6.1 toolchain

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 15.75%. Comparing base (b710112) to head (30a9319).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #129      +/-   ##
==========================================
+ Coverage   15.27%   15.75%   +0.48%     
==========================================
  Files          25       25              
  Lines         622      622              
==========================================
+ Hits           95       98       +3     
+ Misses        527      524       -3     

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