Update ark-ec requirement from ^0.4.0 to ^0.5.0

Updates the requirements on [ark-ec](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/v0.5.0/CHANGELOG.md)
- [Commits](arkworks-rs/algebra@v0.4.0...v0.5.0)

---
updated-dependencies:
- dependency-name: ark-ec
  dependency-type: direct:production
...

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

Cargo.toml

@@ -16,7 +16,7 @@ edition = "2021"
 
 [dependencies]
 ark-ff = { version = "^0.4.0", default-features = false }
-ark-ec = { version = "^0.4.0", default-features = false }
+ark-ec = { version = "^0.5.0", default-features = false }
 ark-serialize = { version = "^0.4.0", default-features = false, features = [ "derive" ] }
 ark-poly = { version = "^0.4.0", default-features = false }
 ark-std = { version = "^0.4.0", default-features = false }