Show diet types field by default on fast food (re: https://github.com/openstreetmap/iD/issues/7918#issuecomment-752121688)

data/presets/amenity/fast_food.json

@@ -3,6 +3,7 @@
     "fields": [
         "name",
         "cuisine",
+        "diet_multi",
         "operator",
         "address",
         "building_area",
@@ -17,7 +18,6 @@
         "brand",
         "capacity",
         "delivery",
-        "diet_multi",
         "email",
         "fax",
         "gnis/feature_id",