Update md-5 requirement from 0.8 to 0.9

Updates the requirements on [md-5](https://github.com/RustCrypto/hashes) to permit the latest version.
- [Release notes](https://github.com/RustCrypto/hashes/releases)
- [Commits](https://github.com/RustCrypto/hashes/compare/groestl-v0.8.0...md2-v0.9.0)

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

lib/Cargo.toml

@@ -17,7 +17,7 @@ rocksdb = { version = "0.14", optional = true }
 sled = { version = "0.32", optional = true }
 quick-xml = "0.18"
 rand = "0.7"
-md-5 = "0.8"
+md-5 = "0.9"
 sha-1 = "0.8"
 sha2 = "0.8"
 digest = "0.8"