Add sorting to doc-string as pointed out in PR review

Author: marcromeyn

merlin/models/torch/transforms/agg.py

@@ -37,6 +37,8 @@ def forward(self, inputs: Dict[str, torch.Tensor]) -> torch.Tensor:
         """
         Concatenates input tensors along the specified dimension.
 
+        The input dictionary will be sorted by name before concatenation.
+
         Parameters
         ----------
         inputs : Dict[str, torch.Tensor]
@@ -77,6 +79,8 @@ def forward(self, inputs: Dict[str, torch.Tensor]) -> torch.Tensor:
 class Stack(nn.Module):
     """Stack tensors along a specified dimension.
 
+    The input dictionary will be sorted by name before concatenation.
+
     Parameters
     ----------
     dim : int