Improve incomplete type hints

kpops/pipeline/__init__.py

@@ -109,7 +109,7 @@ def build_execution_graph(
         async def run_parallel_tasks(
             coroutines: list[Coroutine[Any, Any, None]],
         ) -> None:
-            tasks = []
+            tasks: list[asyncio.Task[None]] = []
             for coro in coroutines:
                 tasks.append(asyncio.create_task(coro))
             await asyncio.gather(*tasks)