build(deps): bump libsecp256k1 from 0.7.1 to 0.7.2 (#1663)

Bumps [libsecp256k1](https://github.com/paritytech/libsecp256k1) from 0.7.1 to 0.7.2.
- [Changelog](https://github.com/paritytech/libsecp256k1/blob/master/CHANGELOG.md)
- [Commits](https://github.com/paritytech/libsecp256k1/commits)

---
updated-dependencies:
- dependency-name: libsecp256k1
  dependency-version: 0.7.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -65,7 +65,7 @@ impl-trait-for-tuples = "0.2.3"
 jsonrpsee = { version = "0.24.8" }
 jsonrpsee-core = { version = "0.24.4" }
 kvdb-rocksdb = "0.19.0"
-libsecp256k1 = { version = "0.7.1", default-features = false }
+libsecp256k1 = { version = "0.7.2", default-features = false }
 log = { version = "0.4.27", default-features = false }
 num_enum = { version = "0.7.3", default-features = false }
 parity-db = "0.4.13"