Mitchell Hashimoto 5b9f4acbc8 ci: update macOS builders to Sequoia (15) and Xcode 16.4
We have been building on macOS 14 and Xcode 16.0 for a longggg time now.
This gets us to a version that will be running Xcode 26 eventually so
we can ultimately build for Tahoe on a stable OS.

This should change nothing in the interim.
2025-06-14 12:32:48 -07:00
..
2025-04-29 18:32:59 +02:00
2022-11-17 10:21:31 -08:00