chore(deps): 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] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -7,7 +7,7 @@ repository = "https://github.com/hiero-ledger/hiero-sdk-rust"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
+tracing-subscriber = { version = "0.3.20", features = ["env-filter"] }
 tokio = { version = "1.47.0", features = ["signal"] }
 anyhow = "1.0.99"
 tower = { version = "0.4.13", features = ["tracing"] }