[release-branch.go1.11] doc: document Go 1.11.11

Change-Id: I1c3e3305dfee4545a6caedd48243770ab3b28277
Reviewed-on: https://go-review.googlesource.com/c/go/+/181550
Reviewed-by: Filippo Valsorda <filippo@golang.org>
(cherry picked from commit 55453016979124e18d3afb53c9df1590877a3b53)
Reviewed-on: https://go-review.googlesource.com/c/go/+/181597
diff --git a/doc/devel/release.html b/doc/devel/release.html
index 531b9d8..98e0513 100644
--- a/doc/devel/release.html
+++ b/doc/devel/release.html
@@ -108,6 +108,12 @@
 1.11.10 milestone</a> on our issue tracker for details.
 </p>
 
+<p>
+go1.11.11 (released 2019/06/11) includes a fix to the <code>crypto/x509</code> package.
+See the <a href="https://github.com/golang/go/issues?q=milestone%3AGo1.11.11">Go
+1.11.11 milestone</a> on our issue tracker for details.
+</p>
+
 <h2 id="go1.10">go1.10 (released 2018/02/16)</h2>
 
 <p>