spec: correct example comment in Conversions from slice to array
spec: correct example comment in Conversions from slice to array

Fixes #47280

Change-Id: I78a8d235949b4878c7f075ac4ca37700e7e6c31c
GitHub-Last-Rev: 067f96eeb2c918eb4f775c428edc945c75af44d8
GitHub-Pull-Request: golang/go#47282
Reviewed-on: https://go-review.googlesource.com/c/go/+/335470
Reviewed-by: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>
Trust: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>
Trust: Than McIntosh <4b2922593166fc595a9b1a408f34f5d3817fe9d2@google.com>

cloudflare/go,golang/go,nawawi/go,CAFxX/go,cloudflare/go,CAFxX/go,CAFxX/go,golang/go,CAFxX/go,nawawi/go,CAFxX/go,nawawi/go,cloudflare/go,cloudflare/go,nawawi/go,nawawi/go,cloudflare/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,cloudflare/go,CAFxX/go,golang/go,golang/go,golang/go,nawawi/go,cloudflare/go,cloudflare/go,golang/go,golang/go,CAFxX/go