Update env_logger requirement from 0.8 to 0.9 (#1426)

Updates the requirements on [env_logger](https://github.com/env-logger-rs/env_logger) to permit the latest version.
- [Release notes](https://github.com/env-logger-rs/env_logger/releases)
- [Changelog](https://github.com/env-logger-rs/env_logger/blob/main/CHANGELOG.md)
- [Commits](rust-cli/env_logger@v0.8.0...v0.9.1)

---
updated-dependencies:
- dependency-name: env_logger
  dependency-type: direct:production
...

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

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

crates/env/Cargo.toml

@@ -58,7 +58,7 @@ serde = { version = "1.0.137", default-features = false, features = ["derive"],
 serde_json = { version = "1.0.81", optional = true }
 tokio = { version = "1.18.2", features = ["rt-multi-thread"], optional = true }
 log = { version = "0.4", optional = true }
-env_logger = { version = "0.8", optional = true }
+env_logger = { version = "0.9", optional = true }
 subxt = { version = "0.24.0", optional = true }
 
 # Substrate

crates/ink/codegen/Cargo.toml

@@ -35,7 +35,7 @@ serde = { version = "1.0.137", default-features = false, features = ["derive"] }
 serde_json = "1.0.81"
 
 log = "0.4"
-env_logger = "0.8"
+env_logger = "0.9"
 
 [features]
 default = ["std"]