less generic icon for shop=nuts - thanks to enzet for an icon (#2090)

Author: matkoniecz

data/presets/shop/nuts.json

@@ -8,7 +8,7 @@
     "tags": {
         "shop": "nuts"
     },
-    "icon": "maki-shop",
+    "icon": "roentgen-hazelnut_with_leaves",
     "geometry": [
         "point",
         "area"