Bump sp-consensus-babe from polkadot-v1.5.0 to polkadot-v1.6.0

Bumps [sp-consensus-babe](https://github.com/paritytech/polkadot-sdk) from polkadot-v1.5.0 to polkadot-v1.6.0.
- [Release notes](https://github.com/paritytech/polkadot-sdk/releases)
- [Commits](paritytech/polkadot-sdk@a3dc2f1...481165d)

---
updated-dependencies:
- dependency-name: sp-consensus-babe
  dependency-type: direct:production
...

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