replace macos-13 github runner

[kevinjqliu]

Describe the enhancement requested

macos-13 is deprecated
https://github.blog/changelog/2025-09-19-github-actions-macos-13-runner-image-is-closing-down/

[lriggs]

I've been looking into this. Can anyone comment on how the build/release process works? I'm guessing the rc.yml workflow is used (and this change would be made there) but I'm not certain.

[lidavidm]

#865