tour: update commits feed link in the TRANSLATE document

Since the go-tour-commits mailing list at

https://groups.google.com/forum/#!forum/go-tour-commits

is no longer active, change the TRANSLATE doc to suggest subscribing
directly to the github commits feed.

Change-Id: I6666d8462a17085e13ef0a09df53b2acc397b4a3
Reviewed-on: https://go-review.googlesource.com/122098
Reviewed-by: Andrew Bonventre <andybons@golang.org>
diff --git a/TRANSLATE b/TRANSLATE
index 8368fd4..fa39dba 100644
--- a/TRANSLATE
+++ b/TRANSLATE
@@ -5,7 +5,7 @@
 App Engine. There are several localized versions of the tour, such as
 this Chinese translation, also running on App Engine:
 
-	http://go-tour-zh.appspot.com
+	https://go-tour-zh.appspot.com
 
 The Tour contains a slide named "Go local", which lists several of
 these translations. If you are a native speaker of a language not on
@@ -25,11 +25,9 @@
 
 The Tour content changes occasionally, and you should keep your
 translation up to date. To follow the development of the tour,
-subscribe to the go-tour-commits mailing list:
+you can subscribe to the feed at
 
-	https://groups.google.com/group/go-tour-commits
-
-All new commits to the go-tour repository are mailed there.
+	https://github.com/golang/tour/commits/master.atom
 
 Finally, if you have any questions about the Tour or Go,
 please mail golang-nuts@googlegroups.com.