GitHub Actions now supports running steps concurrently using background.
Previously, all steps in a workflow ran in sequence, with each step starting only after the previous step completed. Previously, you could run steps in a non-blocking way using shell backgrounding (&), but that often interleaved logs from multiple steps. This new capability enables steps to run in parallel while retaining separate logs and execution.
Four new keywords are being introduced:
background: true runs a step asynchronously and immediately continues to the next step.
wait/wait-all pauses execution until one or more named background steps complete. wait can target one or more specific background steps, while wait-all pauses until all prior background steps have completed.
