Remo Senekowitsch 91fd773859
Change story of exercise async1
- Remove confusing use of atomics. Use return values of async tasks
  instead, to ensure all tasks are awaited.
- Remove use of `println!()`, which uses a global lock and cannot be
  executed in parallel.
2026-04-25 15:33:53 +02:00
..
2026-04-25 15:33:53 +02:00