sync: update comment
sync: update comment

Comment update.

Change-Id: If0d054216f9953f42df04647b85c38008b85b026
GitHub-Last-Rev: 133b4670be6dd1c94d16361c3a7a4bbdf8a355ab
GitHub-Pull-Request: golang/go#31539
Reviewed-on: https://go-review.googlesource.com/c/go/+/172700
Reviewed-by: Austin Clements <7ea35d812706d9213868749011af1ed4fa2f6aa0@google.com>

nawawi/go,akutz/go,akutz/go,golang/go,josharian/go,cloudflare/go,CAFxX/go,josharian/go,akutz/go,golang/go,nawawi/go,golang/go,golang/go,nawawi/go,nawawi/go,cloudflare/go,cloudflare/go,nawawi/go,cloudflare/go,akutz/go,josharian/go,CAFxX/go,josharian/go,cloudflare/go,CAFxX/go,josharian/go,CAFxX/go,nawawi/go,cloudflare/go,akutz/go,nawawi/go,golang/go,CAFxX/go,josharian/go,cloudflare/go,akutz/go,CAFxX/go,golang/go,golang/go,CAFxX/go,golang/go,josharian/go,cloudflare/go,nawawi/go,akutz/go,CAFxX/go,josharian/go,akutz/go