doc: link to Go 1.1 release notes

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9047045

doc/docs.html

@@ -82,6 +82,12 @@ Answers to common questions about Go.
 A guide for updating your code to work with Go 1.
 </p>
 
+<h3 id="go1.1notes"><a href="/doc/go1.1.html">Go 1.1 Release Notes</a></h3>
+<p>
+A list of significant changes in Go 1.1, with instructions for updating your
+code where necessary.
+</p>
+
 <h3 id="go1compat"><a href="/doc/go1compat.html">Go 1 and the Future of Go Programs</a></h3>
 <p>
 What Go 1 defines and the backwards-compatibility guarantees one can expect as