doc: document Go 1.12.14

Change-Id: I7589ef4bdac776c8f141e9cc60f59f8643649310
Reviewed-on: https://go-review.googlesource.com/c/go/+/209840
Reviewed-by: Alexander Rakoczy <[email protected]>
Run-TryBot: Alexander Rakoczy <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>

Author: cagedmantis

doc/devel/release.html

@@ -166,6 +166,12 @@ <h3 id="go1.12.minor">Minor revisions</h3>
 Only macOS users who hit this issue need to update.
 </p>
 
+<p>
+go1.12.14 (released 2019/12/4) includes a fix to the runtime. See
+the <a href="https://github.com/golang/go/issues?q=milestone%3AGo1.12.14">Go
+1.12.14 milestone</a> on our issue tracker for details.
+</p>
+
 <h2 id="go1.11">go1.11 (released 2018/08/24)</h2>
 
 <p>