Update ark-mnt4-298 requirement from 0.5.0 to 0.6.0

Updates the requirements on [ark-mnt4-298](https://github.com/arkworks-rs/algebra) to permit the latest version.
- [Release notes](https://github.com/arkworks-rs/algebra/releases)
- [Changelog](https://github.com/arkworks-rs/algebra/blob/master/CHANGELOG.md)
- [Commits](arkworks-rs/algebra@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: ark-mnt4-298
  dependency-version: 0.6.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -36,7 +36,7 @@ ark-poly = { version = "0.5.0", default-features = false }
 paste = "1.0"
 ark-bls12-377 = { version = "0.5.0", features = ["curve"], default-features = false }
 ark-bls12-381 = { version = "0.5.0", features = ["curve"], default-features = false }
-ark-mnt4-298 = { version = "0.5.0", features = ["curve"], default-features = false }
+ark-mnt4-298 = { version = "0.6.0", features = ["curve"], default-features = false }
 ark-mnt4-753 = { version = "0.5.0", features = ["curve"], default-features = false }
 ark-mnt6-298 = { version = "0.5.0", default-features = false }
 ark-mnt6-753 = { version = "0.5.0", default-features = false }