[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>

VERSION

-go1.18.5
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+go1.18.6
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