Update 'create_schema' example to remove warning
Update 'create_schema' example to remove warning

psantos10/elixir-school,doomspork/elixir_school,erickgnavar/elixir-school,nscyclone/elixir-school,erickgnavar/elixir-school,erickgnavar/elixir-school,doomspork/elixir-school,doomspork/elixir-school,psantos10/elixir-school,nscyclone/elixir-school,psantos10/elixir-school,nscyclone/elixir-school,nscyclone/elixir-school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir_school