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](tokio-rs/tracing@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>

Author: dependabot[bot]

Cargo.lock

@@ -29,7 +29,7 @@ rocket = { version = "0.5.0", features = ["json"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 tracing = "0.1.25"
-tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
+tracing-subscriber = { version = "0.3.20", features = ["env-filter"] }
 uuid = { version = "0.8.2", features = ["v4"] }
 percent-encoding = "2.1.0"
 openssl-sys = { version = "0.9.104", features = ["vendored"] }