Update env_logger requirement from 0.10.1 to 0.11.6

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@v0.10.1...v0.11.6)

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

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

Author: dependabot[bot]

Cargo.toml

@@ -39,7 +39,7 @@ name = "html2text"
 path = "examples/html2text.rs"
 
 [dev-dependencies]
-env_logger = "0.10.1"
+env_logger = "0.11.6"
 argparse = "0.2.2"
 log = "0.4.20"