chore(deps): bump tracing-appender from 0.2.0 to 0.2.1

Bumps [tracing-appender](https://github.com/tokio-rs/tracing) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](https://github.com/tokio-rs/tracing/compare/tracing-appender-0.2.0...tracing-appender-0.2.1)

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

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

Cargo.lock

@@ -1279,9 +1279,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-appender"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94571df2eae3ed4353815ea5a90974a594a1792d8782ff2cbcc9392d1101f366"
+checksum = "9ab026b18a46ac429e5c98bec10ca06424a97b3ad7b3949d9b4a102fff6623c4"
 dependencies = [
  "crossbeam-channel",
  "time",