Update CI.yml to include mac aarch64

[ViralBShah]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.96%. Comparing base (b09dcd7) to head (04c7bf6).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1856   +/-   ##
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  Coverage   85.96%   85.96%           
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  Files         144      144           
  Lines        8647     8647           
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  Hits         7433     7433           
  Misses       1214     1214           

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[devmotion]

If I understand correctly, this change was unnecessary because recently Github updated macos-latest to point to macos-14 which is arm64 exclusive: actions/runner-images#9255 This can be seen from the CI logs as well, the existing macos job already runs on arm64: https://github.com/JuliaStats/Distributions.jl/actions/runs/9144982709/job/25143434782#step:1:8

[ViralBShah]

Oh I didn't realize that they had updated that. I'll revert this.

But I just noticed something that I can't quite understand. The one that I added macOS-14, is specifically pulling Julia for aarch64 (https://github.com/JuliaStats/Distributions.jl/actions/runs/9144982709/job/25143435277#step:3:4), whereas the macOS-latest you pointed me to appears to be pulling in Julia for x64, even though the runner image is aarch64 (https://github.com/JuliaStats/Distributions.jl/actions/runs/9144982709/job/25143434782#step:3:4).

It looks like macOS-14 seems to have support for both aarch64 and x64. The thing that is puzzling is that our matrix says x64, the mac runner is aarch64, setup-julia pulls the x64 binary, and then it seems to work in the CI.

cc @DilumAluthge @IanButterworth