concurrency: corrections de traduction,d'orthographe
concurrency: corrections de traduction,d'orthographe

Merge branch 'patch-1' of https://github.com/diodfr/go-tour-fr into diodfr-patch-1

Conflicts:
	content/concurrency.article

dupoxy/go-tour-fr,dupoxy/go-tour-fr,dupoxy/go-tour-fr