Add amenity=fuel to 1.1

Author: pnorman

shortbread-website/content/schema/1.1.md

@@ -723,6 +723,7 @@ The following key-value combinations are included in this layer:
 - {{< tag amenity fire_station >}}
 - {{< tag amenity food_court >}}
 - {{< tag amenity fountain >}}
+- {{< tag amenity fuel >}}
 - {{< tag amenity grave_yard >}}
 - {{< tag amenity hospital >}}
 - {{< tag amenity hunting_stand >}}