SECURITY.md: replace golang.org with go.dev

Change-Id: Ic0e882fc6666c9adcd5f2dffc96e201f3146fa0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/402180
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
diff --git a/SECURITY.md b/SECURITY.md
index 9e92e8b..ab608f3 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -2,12 +2,12 @@
 
 ## Supported Versions
 
-We support the past two Go releases (for example, Go 1.12.x and Go 1.13.x).
+We support the past two Go releases (for example, Go 1.17.x and Go 1.18.x when Go 1.18.x is the latest stable release).
 
-See https://golang.org/wiki/Go-Release-Cycle and in particular the
-[Release Maintenance](https://github.com/golang/go/wiki/Go-Release-Cycle#release-maintenance)
+See https://go.dev/wiki/Go-Release-Cycle and in particular the
+[Release Maintenance](https://go.dev/wiki/Go-Release-Cycle#release-maintenance)
 part of that page.
 
 ## Reporting a Vulnerability
 
-See https://golang.org/security for how to report a vulnerability.
+See https://go.dev/security for how to report a vulnerability.