git: openjdk/jdk25u: master: 8361478: GHA: Use MSYS2 from GHA runners

[Aleksey Shipilev]

Changeset: 4f99224c
Branch: master
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-08-06 08:44:53 +0000
URL:       https://git.openjdk.org/jdk25u/commit/4f99224c80e5cf8d187f2a9c4e10f014d8e6d6dd

8361478: GHA: Use MSYS2 from GHA runners

Backport-of: ed9066bdf48c2d9925aea745951531ebf4af35a8

! .github/actions/get-msys2/action.yml