fix typo

doc/source/Model_input_output.rst

@@ -351,7 +351,7 @@ Execute various scenarios
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 By employing command-line parameters, you can execute different scenarios using the model. For example, if you wish to run a scenario referred to as "low demand," you can prepare input data named ``demand_low.xlsx``. Subsequently, when running the model, you can utilize command-line parameters to specify the scenario value. For instance, you can execute the model by executing the command ``python run.py --demand=low``. 
 
-Setting Global Parameters
+Setting global parameters
 -----------------------
 
 This section will guide you on how to tune the PREP-SHOT model parameters to compute the energy system for your needs. After you have prepared your input data based on the previous sections, you can proceed to tune the model parameters before you run it.