build(deps): bump secp256k1 from 0.22.1 to 0.22.2

Bumps [secp256k1](https://github.com/rust-bitcoin/rust-secp256k1) from 0.22.1 to 0.22.2.
- [Release notes](https://github.com/rust-bitcoin/rust-secp256k1/releases)
- [Changelog](https://github.com/rust-bitcoin/rust-secp256k1/blob/secp256k1-0.22.2/CHANGELOG.md)
- [Commits](rust-bitcoin/rust-secp256k1@secp256k1-0.22.1...secp256k1-0.22.2)

---
updated-dependencies:
- dependency-name: secp256k1
  dependency-type: direct:production
...

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

Author: dependabot[bot]