[release-branch.go1.18] go1.18.6

Change-Id: I43342887545e5c322528590cc8599bbbad0df114
Reviewed-on: https://go-review.googlesource.com/c/go/+/428698
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Gopher Robot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>
diff --git a/VERSION b/VERSION
index 497dca0..9fe6499 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-go1.18.5
\ No newline at end of file
+go1.18.6
\ No newline at end of file