fix: set torch seed in doc

docs/user/howto/compiling_torch_model.md

@@ -9,6 +9,7 @@ A simple command can compile a torch model to its FHE counterpart. This process
 ```python
 from torch import nn
 import torch
+torch.manual_seed(0)
 class LogisticRegression(nn.Module):
     """LogisticRegression with Torch"""