[x/blog] go.blog: fix typo in normalization article table
[x/blog] go.blog: fix typo in normalization article table

R=rsc
https://golang.org/cl/33630044
X-Blog-Commit: 7ca216336188ae9a7621a34e270d120ee093fea1

golang/website,golang/website,golang/website,golang/website,golang/website,golang/website,golang/website