修正限流机制，将信号量从 5 更改为 50，以支持更多并发任务执行

sync.py

@@ -40,7 +40,7 @@ async def docker_push(image: str) -> int | None:
     print(f"Pushing image {image}...")
     return await run_command(f"docker push {image}")
 
-semaphore = asyncio.Semaphore(5)
+semaphore = asyncio.Semaphore(50)
 
 async def limited_task[T: Any](task: Callable[[], Coroutine[None, None, T]]) -> T:
     async with semaphore: