Fix typehint

Author: stefanradev93

bayesflow/simulators/lambda_simulator.py

@@ -12,13 +12,13 @@
 class LambdaSimulator(Simulator):
     """Implements a simulator based on a sampling function."""
 
-    def __init__(self, sample_fn: Callable[Sequence[int, Mapping[str, any]]], *, is_batched: bool = False):
+    def __init__(self, sample_fn: Callable[[Sequence[int]], Mapping[str, any]], *, is_batched: bool = False):
         """
         Initialize a simulator based on a simple callable function
 
         Parameters
         ----------
-        sample_fn : Callable[Sequence[int, Mapping[str, any]]]
+        sample_fn : Callable[[Sequence[int]], Mapping[str, any]]
             A function that generates samples. It should accept `batch_shape` as its first argument
             (if `is_batched=True`), followed by keyword arguments.
         is_batched : bool, optional