Bump k256 from 0.11.6 to 0.13.0 (#13624)

Bumps [k256](https://github.com/RustCrypto/elliptic-curves) from 0.11.6 to 0.13.0.
- [Release notes](https://github.com/RustCrypto/elliptic-curves/releases)
- [Commits](https://github.com/RustCrypto/elliptic-curves/compare/k256/v0.11.6...k256/v0.13.0

)

---
updated-dependencies:
- dependency-name: k256
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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