Bump sp-core from 19.0.0 to 20.0.0 in /ci/no-std-check (#611)

Bumps [sp-core](https://github.com/paritytech/substrate) from 19.0.0 to 20.0.0.
- [Release notes](https://github.com/paritytech/substrate/releases)
- [Changelog](https://github.com/paritytech/substrate/blob/master/docs/CHANGELOG.md)
- [Upgrade guide](https://github.com/paritytech/substrate/blob/master/docs/Upgrade.md)
- [Commits](https://github.com/paritytech/substrate/commits)

---
updated-dependencies:
- dependency-name: sp-core
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

ci/no-std-check/Cargo.toml

@@ -17,7 +17,7 @@ tendermint = { version = "0.29.0", default-features = false }
 tendermint-proto = { version = "0.29.0", default-features = false }
 tendermint-light-client-verifier = { version = "0.29.0", default-features = false, features = ["rust-crypto"] }
 
-sp-core = { version = "19.0.0", default-features = false, optional = true }
+sp-core = { version = "20.0.0", default-features = false, optional = true }
 sp-io = { version = "21.0.0", default-features = false, optional = true }
 sp-runtime = { version = "22.0.0", default-features = false, optional = true }
 sp-std = { version = "7.0.0", default-features = false, optional = true }