design/25530-notary: drop use of notary as much as possible
design/25530-notary: drop use of notary as much as possible

We are trying to avoid confusion with the CNCF notary,
so the Go notary is now the Go checksum database.

Change-Id: If140ed47b61d37612cdb73bb89c0d34d4d6e8e78
Reviewed-on: https://go-review.googlesource.com/c/proposal/+/173541
Run-TryBot: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
Reviewed-by: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

golang/proposal,golang/proposal