[release-branch.go1.21] go1.21.3

Change-Id: Icdde32852b305006d7064cfe8bbe143128191842
Reviewed-on: https://go-review.googlesource.com/c/go/+/534337
TryBot-Bypass: Dmitri Shuralyov <dmitshur@google.com>
Commit-Queue: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
diff --git a/VERSION b/VERSION
index f115bef..c284f64 100644
--- a/VERSION
+++ b/VERSION
@@ -1,2 +1,2 @@
-go1.21.2
-time 2023-09-28T20:21:36Z
+go1.21.3
+time 2023-10-09T17:04:35Z