build(deps): bump zeroize from 1.5.1 to 1.5.2 in /elliptic-curve (#929)

Bumps [zeroize](https://github.com/RustCrypto/utils) from 1.5.1 to 1.5.2.
- [Release notes](https://github.com/RustCrypto/utils/releases)
- [Commits](https://github.com/RustCrypto/utils/commits)

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

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

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