changed subsample in adapter.py to allow float as an input for the sample size

Author: eodole

bayesflow/adapters/adapter.py

@@ -547,7 +547,7 @@ def one_hot(self, keys: str | Sequence[str], num_classes: int):
     def random_subsample(self,
         keys: str | Sequence[str],
         *,
-        sample_size: int,
+        sample_size: int | float,
         axis: int=-1,
         **kwargs,
     ):