Bumps [digest](https://github.com/RustCrypto/traits) from 0.8.0 to 0.8.1. - [Release notes](https://github.com/RustCrypto/traits/releases) - [Commits](RustCrypto/traits@digest-v0.8.0...digest-v0.8.1) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>