Fix typo in essence mixin
Fix typo in essence mixin

robinboening/alchemy_cms,mamhoff/alchemy_cms,mamhoff/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,mamhoff/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms,AlchemyCMS/alchemy_cms