Bump to Swift 6.1 Toolchain

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 22.67%. Comparing base (6f03a71) to head (591644c).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Sources/OpenSwiftUICore/View/IDView.swift	0.00%	5 Missing ⚠️
...n/Render/AppKit/NSViewPlatformViewDefinition.swift	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #276      +/-   ##
==========================================
+ Coverage   22.63%   22.67%   +0.03%     
==========================================
  Files         337      337              
  Lines       15862    15860       -2     
==========================================
+ Hits         3591     3596       +5     
+ Misses      12271    12264       -7     

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