Fix Pylance TypeVar usage warning by refining async_timeout signature

Author: filipchristiansen

src/gitingest/utils.py

@@ -9,7 +9,7 @@
 T = TypeVar("T")
 
 
-def async_timeout(seconds: int = 10) -> Callable[..., Callable[..., Awaitable[T]]]:
+def async_timeout(seconds: int = 10) -> Callable[[Callable[..., Awaitable[T]]], Callable[..., Awaitable[T]]]:
     """
     Async Timeout decorator.