Update docs/community/contributing-emulators.md

Co-authored-by: Sophie Arana <[email protected]>

docs/community/contributing-emulators.md

@@ -61,7 +61,7 @@ After your emulator passes tests:
 PyTorch emulators require special handling:
 
 1. Put the model architecture in `autoemulate/emulators/neural_networks/`
-2. Put themain emulator class in `autoemulate/emulators/`
+2. Put the main emulator class in `autoemulate/emulators/`
 3. Use [skorch](https://skorch.readthedocs.io/) for scikit-learn compatibility:
    - Create `self.model_` as `NeuralNetRegressor` instance
    - Pass model architecture as first argument