Bump tracing-subscriber from 0.3.19 to 0.3.20

Bumps [tracing-subscriber](https://github.com/tokio-rs/tracing) from 0.3.19 to 0.3.20.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](https://github.com/tokio-rs/tracing/compare/tracing-subscriber-0.3.19...tracing-subscriber-0.3.20)

---
updated-dependencies:
- dependency-name: tracing-subscriber
  dependency-version: 0.3.20
  dependency-type: direct:production
...

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

Cargo.toml

@@ -12,4 +12,4 @@ rand = "0.9.1"
 serenity = "0.12.4"
 tokio = { version = "1.44.2", features = ["full"] }
 tracing = "0.1.41"
-tracing-subscriber = "0.3.19"
+tracing-subscriber = "0.3.20"