build(deps): bump crypto-bigint from 0.6.0-rc.3 to 0.6.0-rc.4 (#523)

Bumps [crypto-bigint](https://github.com/RustCrypto/crypto-bigint) from 0.6.0-rc.3 to 0.6.0-rc.4.
- [Changelog](https://github.com/RustCrypto/crypto-bigint/blob/master/CHANGELOG.md)
- [Commits](RustCrypto/crypto-bigint@v0.6.0-rc.3...crypto-bigint/v0.6.0-rc.4)

---
updated-dependencies:
- dependency-name: crypto-bigint
  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>

balloon-hash/Cargo.toml

@@ -15,7 +15,7 @@ rust-version = "1.73"
 
 [dependencies]
 digest = { version = "=0.11.0-pre.9", default-features = false }
-crypto-bigint = { version = "0.6.0-rc.3", default-features = false, features = ["hybrid-array"] }
+crypto-bigint = { version = "0.6.0-rc.4", default-features = false, features = ["hybrid-array"] }
 
 # optional dependencies
 password-hash = { version = "0.6.0-rc.0", default-features = false, optional = true }