doc/contribute: golang-dev -> golang-codereviews

R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/46320043

doc/contribute.html

@@ -240,7 +240,7 @@ These can be code review nicknames or arbitrary email addresses.
 Unless explicitly told otherwise, such as in the discussion leading
 up to sending in the change list, leave the reviewer field blank.
 This means that the
-<a href="http://groups.google.com/group/golang-dev">golang-dev@googlegroups.com</a>
+<a href="http://groups.google.com/group/golang-codereviews">golang-codereviews@googlegroups.com</a>
 mailing list will be used as the reviewer.
 </p>
 
@@ -270,7 +270,7 @@ After editing, the template might now read:
 # Lines beginning with # are ignored.
 # Multi-line values should be indented.
 
-Reviewer: golang-dev@googlegroups.com
+Reviewer: golang-codereviews@googlegroups.com
 CC: math-nuts@swtch.com
 
 Description:
@@ -448,7 +448,7 @@ lines blank and then run:
 </p>
 
 <pre>
-$ hg mail -r golang-dev@googlegroups.com --cc math-nuts@swtch.com 99999
+$ hg mail -r golang-codereviews@googlegroups.com --cc math-nuts@swtch.com 99999
 </pre>
 
 <p>to achieve the same effect.</p>