Move remaining macos-14 steps to macos-15

[joshedney]

Goal

Move remaining macos-14 steps to macos-15

Testing

Covered by CI

[github-actions]

Browser bundle size

NPM build

	Package
Before	233.22 kB
After	233.22 kB
±	No change

CDN build

	Unminified	Minfied	Minified + gzipped
Before	118.22 kB	45.69 kB	13.17 kB
After	118.22 kB	45.69 kB	13.17 kB
±	No change	No change	No change

Code coverage

Coverage values did not change👌.

Total:

Lines	Branches	Functions	Statements
82.35%(+0%)	61.28%(+0%)	72.26%(+0%)	78.78%(+0%)

Generated against 88d443d on 1 August 2025 at 13:05:39 UTC