git: openjdk/jfx: master: 8369140: GHA: Update macOS / x64 build to use macos-15-intel runner

[Kevin Rushforth]

Changeset: e8820e24
Branch: master
Author:    Kevin Rushforth <kcr at openjdk.org>
Date:      2025-10-06 22:16:53 +0000
URL:       https://git.openjdk.org/jfx/commit/e8820e2482bbc00765975854e738fdc214a46ea4

8369140: GHA: Update macOS / x64 build to use macos-15-intel runner

Reviewed-by: arapte

! .github/workflows/submit.yml