Update index.html
Update index.html

Missing word `to` in doc
Feasul/Backbone-relational,nikolas/Backbone-relational,PaulUithol/Backbone-relational,Feasul/Backbone-relational,xcambar/Backbone-relational,goodwall/Backbone-relational,closeio/Backbone-relational,nikolas/Backbone-relational,matghaleb/Backbone-relational,goodwall/Backbone-relational,matghaleb/Backbone-relational,xcambar/Backbone-relational,closeio/Backbone-relational,leeleo26/Backbone-relational,PaulUithol/Backbone-relational,leeleo26/Backbone-relational