build(deps): bump multihash from 0.17.0 to 0.18.1

Bumps [multihash](https://github.com/multiformats/rust-multihash) from 0.17.0 to 0.18.1.
- [Changelog](https://github.com/multiformats/rust-multihash/blob/master/CHANGELOG.md)
- [Commits](multiformats/rust-multihash@v0.17.0...v0.18.1)

---
updated-dependencies:
- dependency-name: multihash
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -21,7 +21,7 @@ indexmap = { version = "2.0.0", features = ["std"] }
 libc = "0.2.142"
 mockall = "0.12.1"
 multiaddr = "0.17.0"
-multihash = { version = "0.17.0", default-features = false, features = ["std", "multihash-impl", "identity", "sha2"] }
+multihash = { version = "0.18.1", default-features = false, features = ["std", "multihash-impl", "identity", "sha2"] }
 network-interface = "1.1.1"
 parking_lot = "0.12.1"
 pin-project = "1.1.0"