Update env_logger requirement from 0.10 to 0.11

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@v0.10.0...v0.11.0)

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

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

examples/Cargo.toml

@@ -9,6 +9,6 @@ edition = "2018"
 nalgebra = "0.32"
 adskalman = {path=".."}
 nalgebra-rand-mvn = {git="https://github.com/strawlab/nalgebra-rand-mvn", rev="40dd19c5967b24389452aa8c540f643b10fe4e34"}
-env_logger = "0.10"
+env_logger = "0.11"
 log = { version = "0.4", features = ["release_max_level_debug"] }
 anyhow = "1.0"