Correct order of arguments

Author: EinarElen

python/photonuclear_models.py

@@ -111,10 +111,11 @@ def __init__(self, name):
         self.min_products = 1
         self.pdg_ids = []
 
-    def kaon(min_products = 1, hard_particle_threshold):
+    def kaon(min_products = 1, hard_particle_threshold=200.):
         # Note: By default, this is requiring at least 1 kaon with at least 200
         # MeV. You may want a different energy threshold depending on your needs.
         model = BertiniAtLeastNProductsModel(f"{min_products}_kaon_model")
+        model.hard_particle_threshold=hard_particle_threshold
         model.pdg_ids = [
                 130, # K_L^0
                 310, # K_S^0