Nit re error message

[smoelius]

cargo-supply-chain/src/subcommands/update.rs

Line 15 in ede428b

DownloadState::Stale => bail!("Downloaded latest daily data dump.\n Warning: it matches the previous version that was considered outdated."),

The above error message displays as:

Error: Downloaded latest daily data dump.
  Warning: it matches the previous version that was considered outdated.

"Downloaded latest daily data dump" sounds like the operation succedded, which is unintuitive considering it appears after "Error".

Perhaps something the like the following would better convey the message?

Error: Latest daily data dump matches the previous version, which was considered outdated.

[Shnatsel]

Good catch! Yes, it needs to be more clear. I'd appreciate a PR with this change.