chore(ci): Remove deprecated macos-latest in favor of macos-15

[kclowes]

🗒️ Description

There is a github actions warning that says macos-latest will become macos-15 on August 4. Updated our CI.

🔗 Related Issues or PRs

N/A.

✅ Checklist

• All: Ran fast tox checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  uvx --with=tox-uv tox -e lint,typecheck,spellcheck,markdownlint

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered adding an entry to CHANGELOG.md.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

[marioevz]

I could not find the warning message in our runs but I could find this blog post, https://github.blog/changelog/2025-07-11-upcoming-changes-to-macos-hosted-runners-macos-latest-migration-and-xcode-support-policy-updates/.

From what I understand, the macos-latest tag remains but it's just going to be updated to point to macos-15 instead of macos-14?

[kclowes]

Oh, nice catch. I misread and thought they were deprecating the latest. Will close!

[marioevz]

It seems like evmone just recently got updated to require xcode 16, which is only available in macos 15, and macos-latest for some reason points to macos-14.

I'll reopen this PR to see if we can successfully compile evmone with this change.

[marioevz]

LGTM, thanks!