go.blog: fix links in page footer
go.blog: fix links in page footer

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://codereview.appspot.com/78490043

d0f/go-zh.blog,bryanxu/go-zh.blog,bryanxu/go-zh.blog,d0f/go-zh.blog,webfd/go-zh.blog,webfd/go-zh.blog