codelab/index.html: a few typos.
codelab/index.html: a few typos.

R=adg
CC=golang-dev
http://codereview.appspot.com/993042

Committer: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go