build(deps): bump sha2 from 0.9.0 to 0.9.1 (#455)

Bumps [sha2](https://github.com/RustCrypto/hashes) from 0.9.0 to 0.9.1.
- [Release notes](https://github.com/RustCrypto/hashes/releases)
- [Commits](RustCrypto/hashes@sha2-v0.9.0...sha2-v0.9.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Shella Stephens <shella@iqlusion.io>