On a host-mode ephemeral runner (eph-pve3-112), NEEDRESTART_MODE=a made
needrestart restart act-runner.service during an apt-get install, which
killed the build-linux job (PR #76, run 5217). Skip needrestart entirely
with NEEDRESTART_SUSPEND=1, and fall back to list-only mode (l), which
never prompts and never restarts anything.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>