submodules: bump external/cli from 70d9313 to 4dcfe06

Bumps [external/cli](https://github.com/oasisprotocol/cli) from `70d9313` to `4dcfe06`.
- [Release notes](https://github.com/oasisprotocol/cli/releases)
- [Commits](oasisprotocol/cli@70d9313...4dcfe06)

---
updated-dependencies:
- dependency-name: external/cli
  dependency-type: direct:production
...

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