chore(deps): bump polkadot-sdk from 3bfc6ec to 0c70641

Bumps [polkadot-sdk](https://github.com/paritytech/polkadot-sdk) from `3bfc6ec` to `0c70641`.
- [Release notes](https://github.com/paritytech/polkadot-sdk/releases)
- [Commits](paritytech/polkadot-sdk@3bfc6ec...0c70641)

---
updated-dependencies:
- dependency-name: polkadot-sdk
  dependency-version: 0c70641e25b2cdb23cce844b50ec3f00da4ef6f4
  dependency-type: direct:production
...

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

Author: dependabot[bot]