cargo: bump env_logger from 0.9.0 to 0.9.1

Bumps [env_logger](https://github.com/env-logger-rs/env_logger) from 0.9.0 to 0.9.1.
- [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/v0.9.0...v0.9.1)

---
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

@@ -971,7 +971,7 @@ dependencies = [
  "async-channel",
  "axum",
  "deltachat",
- "env_logger 0.9.0",
+ "env_logger 0.9.1",
  "futures",
  "log",
  "num-traits",
@@ -1286,9 +1286,9 @@ dependencies = [
 
 [[package]]
 name = "env_logger"
-version = "0.9.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b2cf0344971ee6c64c31be0d530793fba457d322dfec2810c453d0ef228f9c3"
+checksum = "c90bf5f19754d10198ccb95b70664fc925bd1fc090a0fd9a6ebc54acc8cd6272"
 dependencies = [
  "atty",
  "humantime 2.1.0",

deltachat-jsonrpc/Cargo.toml

@@ -28,7 +28,7 @@ tokio = { version = "1.19.2" }
 
 # optional dependencies
 axum = { version = "0.5.9", optional = true, features = ["ws"] }
-env_logger = { version = "0.9.0", optional = true }
+env_logger = { version = "0.9.1", optional = true }
 walkdir = "2.3.2"
 
 [dev-dependencies]