[release-branch.go1.21] go1.21.2

Change-Id: Ie06bc8d8e8e170f13ed938a33038931513eaf067
Reviewed-on: https://go-review.googlesource.com/c/go/+/533238
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

Author: gopherbot

VERSION

@@ -1,2 +1,2 @@
-go1.21.1
-time 2023-08-31T22:36:09Z
+go1.21.2
+time 2023-09-28T20:21:36Z