chore(deps): update halo2curves requirement

Updates the requirements on [halo2curves](https://github.com/privacy-scaling-explorations/halo2curves) to permit the latest version.

Updates `halo2curves` to 0.7.0
- [Release notes](https://github.com/privacy-scaling-explorations/halo2curves/releases)
- [Commits](privacy-scaling-explorations/halo2curves@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: halo2curves
  dependency-type: direct:production
  dependency-group: rust-dependencies
...

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

Cargo.toml

@@ -16,7 +16,7 @@ bellpepper-core = { version = "0.4.0", default-features = false }
 bellpepper = { git="https://github.com/lurk-lab/bellpepper", branch="dev", default-features = false }
 ff = { version = "0.13.0", features = ["derive"] }
 digest = "0.10"
-halo2curves = { version = "0.6.0", features = ["bits", "derive_serde"] }
+halo2curves = { version = "0.7.0", features = ["bits", "derive_serde"] }
 sha3 = "0.10"
 rayon = "1.7"
 rand_core = { version = "0.6", default-features = false }