Update env_logger requirement from 0.7.1 to 0.10.0

Updates the requirements on [env_logger](https://github.com/rust-cli/env_logger) to permit the latest version.
- [Release notes](https://github.com/rust-cli/env_logger/releases)
- [Changelog](https://github.com/rust-cli/env_logger/blob/main/CHANGELOG.md)
- [Commits](rust-cli/env_logger@v0.7.1...v0.10.0)

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

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

Author: dependabot[bot]

server/Cargo.toml

@@ -13,7 +13,7 @@ actix = "0.10.0" # Actor communication between handlers and Git
 actix-rt = "1.1.1" # Actix macros
 actix-web = "3.0.2" # Web framework
 clap = "4.1.6" # CLI argument parsing
-env_logger = "0.7.1" # Configure logging level with env variables
+env_logger = "0.10.0" # Configure logging level with env variables
 log = "0.4.11" # Logging facade
 serde = "1.0.114" # Serialisation of results
 serde_derive = "1.0.114" # Macros for deriving Serde converstions