Bump log from 0.4.7 to 0.4.8 (#5382)

Bumps [log](https://github.com/rust-lang/log) from 0.4.7 to 0.4.8.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang-nursery/log/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/log/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

metrics/Cargo.toml

@@ -12,7 +12,7 @@ edition = "2018"
 env_logger = "0.6.2"
 influx_db_client = "0.3.6"
 lazy_static = "1.3.0"
-log = "0.4.7"
+log = "0.4.8"
 reqwest = "0.9.19"
 solana-sdk = { path = "../sdk", version = "0.18.0-pre0" }
 sys-info = "0.5.7"