Update 2013-10-01-iPhone_5c.md with type fix.

It might seem a little prim and fussy to issue a pull request for a simple typo, but I did want to see how github works their pull request flow on public projects. I'm impressed that all you need to do is just hit the edit button and github looks after the forking, then it prompts you to make a pull request straight away. Frictionless contribution FTW! :D