Bump tracing from 0.1.30 to 0.1.31 (#4941)

Bumps [tracing](https://github.com/tokio-rs/tracing) from 0.1.30 to 0.1.31.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](https://github.com/tokio-rs/tracing/compare/tracing-0.1.30...tracing-0.1.31)

---
updated-dependencies:
- dependency-name: tracing
  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>

polkadot/node/metered-channel/Cargo.toml

@@ -9,7 +9,7 @@ description = "Channels with attached Meters"
 futures = "0.3.21"
 futures-timer = "3.0.2"
 derive_more = "0.99"
-tracing = "0.1.30"
+tracing = "0.1.31"
 thiserror = "1.0.30"
 
 [dev-dependencies]
@@ -17,4 +17,4 @@ futures = { version = "0.3.21", features = ["thread-pool"] }
 assert_matches = "1.5"
 env_logger = "0.9"
 log = "0.4"
-tracing = { version = "0.1.30", features = ["log"] }
+tracing = { version = "0.1.31", features = ["log"] }