doc: update codelab/wiki to Go 1.

R=golang-dev, r, adg
CC=golang-dev
https://golang.org/cl/5683076
diff --git a/doc/codelab/wiki/final-noerror.go b/doc/codelab/wiki/final-noerror.go
index e86bc1a..e11d268 100644
--- a/doc/codelab/wiki/final-noerror.go
+++ b/doc/codelab/wiki/final-noerror.go
@@ -5,9 +5,9 @@
 package main
 
 import (
+	"html/template"
 	"io/ioutil"
 	"net/http"
-	"text/template"
 )
 
 type Page struct {