Bump log from 0.4.19 to 0.4.20 (#3009)

Bumps [log](https://github.com/rust-lang/log) from 0.4.19 to 0.4.20.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/log/compare/0.4.19...0.4.20)

---
updated-dependencies:
- dependency-name: log
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

cumulus/client/consensus/common/Cargo.toml

@@ -10,7 +10,7 @@ async-trait = "0.1.73"
 codec = { package = "parity-scale-codec", version = "3.0.0", features = [ "derive" ] }
 dyn-clone = "1.0.12"
 futures = "0.3.28"
-log = "0.4.19"
+log = "0.4.20"
 tracing = "0.1.37"
 
 # Substrate