Bump contracts/lib/teleporter from f23da2d to c84670b

Bumps [contracts/lib/teleporter](https://github.com/ava-labs/teleporter) from `f23da2d` to `c84670b`.
- [Release notes](https://github.com/ava-labs/teleporter/releases)
- [Commits](ava-labs/teleporter@f23da2d...c84670b)

---
updated-dependencies:
- dependency-name: contracts/lib/teleporter
  dependency-type: direct:production
...

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