Bump GitHub Actions to current majors
AD
4d ago+14+14+01234567890123456789-14-14-01234567890123456789
Bumps GitHub Actions to their current major versions. Only the uses: lines change.
CI passed on this exact commit. The deploy-backend and deploy-frontend workflow only runs after merge, so it wasn't exercised here. No new regression test was added since this is a workflow-only change.
Summary by cubic
Bumps GitHub Actions in the CI and deploy workflows to their current major versions, and updates the DEPLOY.md reference to match. Only the uses: lines and the doc reference change; no workflow behavior changes.
CI passed on this exact commit. The deploy-backend and deploy-frontend workflows only run after merge, so they weren't exercised here.