git: openjdk/jdk8u-dev: 8369226: GHA: Switch to MacOS 15

[Andrew John Hughes]

Changeset: 44a0268a
Branch: master
Author:    Andrew John Hughes <andrew at openjdk.org>
Date:      2026-02-03 17:33:43 +0000
URL:       https://git.openjdk.org/jdk8u-dev/commit/44a0268a4e864aa28dcd237d345e22a3c580ab78

8369226: GHA: Switch to MacOS 15

Reviewed-by: sgehwolf, serb
Backport-of: 1b0f612e5e08cfa1581cf22433b36b5f075c0f23

! .github/workflows/submit.yml