Update migration_guide.md (#2347)

* Update migration_guide.md

* Update migration_guide.md

Author: quaquel

docs/migration_guide.md

@@ -42,15 +42,16 @@ The `mesa.flat` namespace is removed. Use the full namespace for your imports.
 
 
 ### Mandatory Model initialization with `super().__init__()`
-In Mesa 3.0, it is now mandatory to call `super().__init__()` when initializing your model class. This ensures that all necessary Mesa model variables are correctly set up and agents are properly added to the model.
+In Mesa 3.0, it is now mandatory to call `super().__init__()` when initializing your model class. This ensures that all necessary Mesa model variables are correctly set up and agents are properly added to the model. If you want to control the seed of the random number generator, you have to pass this as a keyword argument to super as shown below.
 
 Make sure all your model classes explicitly call `super().__init__()` in their `__init__` method:
 
 ```python
 class MyModel(mesa.Model):
-    def __init__(self, *args, **kwargs):
-        super().__init__()  # This is now required!
+    def __init__(self, some_arg_I_need, seed=None, some_kwarg_I_need=True):
+        super().__init__(seed=seed)  # Calling super is now required, passing seed is highly recommended
         # Your model initialization code here
+        # this code uses some_arg_I_need and my_init_kwarg
 ```
 
 This change ensures that all Mesa models are properly initialized, which is crucial for: