fix _dojo.html.haml

dojo-description is correct

Author: takatama

app/views/shared/_dojo.html.haml

@@ -10,7 +10,7 @@
   %ul.tags
     - dojo.tags.each do |tag|
       %li= tag
-  %p.dojo-desciption
+  %p.dojo-description
     = dojo.description
     - if dojo.is_private
       = link_to 'Private', doc_path('private-dojo'), class: 'dojo-private'