git: openjdk/jdk17u-dev: 8369226: GHA: Switch to MacOS 15

[Aleksey Shipilev]

Changeset: 7fe25530
Branch: master
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-11-06 10:45:29 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/7fe25530c47cacc11c5214ef7ef4db443701eabf

8369226: GHA: Switch to MacOS 15

Reviewed-by: mdoerr
Backport-of: 1ea8cfa6dc8e6f96fd87553331abaae17ec173ea

! .github/workflows/main.yml