Bump sha2 from 0.9.6 to 0.9.8 (#2746)

Bumps [sha2](https://github.com/RustCrypto/hashes) from 0.9.6 to 0.9.8.
- [Release notes](https://github.com/RustCrypto/hashes/releases)
- [Commits](https://github.com/RustCrypto/hashes/compare/sha2-v0.9.6...sha2-v0.9.8)

---
updated-dependencies:
- dependency-name: sha2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Deirdre Connolly <deirdre@zfnd.org>

Cargo.lock

@@ -3256,9 +3256,9 @@ dependencies = [
 
 [[package]]
 name = "sha2"
-version = "0.9.6"
+version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9204c41a1597a8c5af23c82d1c921cb01ec0a4c59e07a9c7306062829a3903f3"
+checksum = "b69f9a4c9740d74c5baa3fd2e547f9525fa8088a8a958e0ca2409a514e33f5fa"
 dependencies = [
  "block-buffer",
  "cfg-if 1.0.0",

zebra-chain/Cargo.toml

@@ -40,7 +40,7 @@ ripemd160 = "0.9"
 secp256k1 = { version = "0.20.3", features = ["serde"] }
 serde = { version = "1", features = ["serde_derive", "rc"] }
 serde-big-array = "0.3.2"
-sha2 = { version = "0.9.6", features=["compress"] }
+sha2 = { version = "0.9.8", features=["compress"] }
 subtle = "2.4"
 thiserror = "1"
 uint = "0.9.1"