Fix typo in error message

Author: ValerianRey

src/torchjd/autogram/_engine.py

@@ -156,7 +156,7 @@ def _check_module_is_compatible(module: nn.Module) -> None:
             raise ValueError(
                 f"Found a module of type {type(module)}, with `track_running_stats=True`, which is "
                 "incompatible with the autogram engine due to performing in-place operations on "
-                "tensors and having side-effects during the forward pass. Try setting"
+                "tensors and having side-effects during the forward pass. Try setting "
                 "`track_running_stats` to `False`."
             )