git: openjdk/jdk21u-dev: master: 8343923: GHA: Switch to Xcode 15 on MacOS AArch64 runners

[Martin Doerr]

Changeset: 4b1365ea
Branch: master
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2024-11-18 16:24:45 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/4b1365eaab151ecf5ff2c40e4292d93137499c06

8343923: GHA: Switch to Xcode 15 on MacOS AArch64 runners

Backport-of: 4c5bc5f2f091ae861d5329cdae42fe7fa295544b

! .github/workflows/main.yml
! .github/workflows/test.yml