build: bump env_logger from 0.8.3 to 0.8.4

Bumps [env_logger](https://github.com/env-logger-rs/env_logger) from 0.8.3 to 0.8.4.
- [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](https://github.com/env-logger-rs/env_logger/compare/v0.8.3...v0.8.4)

---
updated-dependencies:
- dependency-name: env_logger
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -277,9 +277,9 @@ dependencies = [
 
 [[package]]
 name = "env_logger"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17392a012ea30ef05a610aa97dfb49496e71c9f676b27879922ea5bdf60d9d3f"
+checksum = "a19187fea3ac7e84da7dacf48de0c45d63c6a76f9490dae389aead16c243fce3"
 dependencies = [
  "atty",
  "humantime",

hypervisor/Cargo.toml

@@ -32,4 +32,4 @@ default-features = false
 features = ["std", "decoder", "op_code_info", "instr_info", "fast_fmt"]
 
 [dev-dependencies]
-env_logger = "0.8.3"
+env_logger = "0.8.4"