Merge pull request #3428 from colindean/bug/assigned-team-typo

fix typo: shure -> sure

app/views/team_members/_assigned_team.html.haml

 %li{id: dom_id(team), class: "user_team_row team_#{team.id}"}
   .pull-right
     - if can?(current_user, :admin_team_member, @project)
-      = link_to resign_project_team_path(@project, team), method: :delete, confirm: "Are you shure?", class: "btn btn-remove btn-tiny" do
+      = link_to resign_project_team_path(@project, team), method: :delete, confirm: "Are you sure?", class: "btn btn-remove btn-tiny" do
         %i.icon-minus.icon-white
 
   %strong= link_to team.name, team_path(team), title: team.name, class: "dark"