James Dansereau 0c2673f636 CI: bump actions/checkout and actions/upload-artifact v4 -> v7 ...

Latest majors; clears the pending Dependabot bumps so the repo goes
public with a clean slate. setup-msys2@v2 is current.

Claude-Session: https://claude.ai/code/session_01GULf6knbsqfsnW39tMr9WT

2026-09-01 22:54:26 -04:00

..

ci.yml

CI: bump actions/checkout and actions/upload-artifact v4 -> v7

2026-09-01 22:54:26 -04:00