Auto merge of #4530 - rust-lang:renovate/tracing-subscriber-0.x, r=Turbo87

Update Rust crate tracing-subscriber to v0.3.8

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [tracing-subscriber](https://crates.io/crates/tracing-subscriber) | dependencies | patch | `=0.3.7` -> `=0.3.8` |

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Author: bors

Cargo.lock

@@ -85,7 +85,7 @@ thiserror = "=1.0.30"
 tokio = { version = "=1.16.1", features = ["net", "signal", "io-std", "io-util", "rt-multi-thread", "macros"]}
 toml = "=0.5.8"
 tracing = "=0.1.30"
-tracing-subscriber = { version = "=0.3.7", features = ["env-filter"] }
+tracing-subscriber = { version = "=0.3.8", features = ["env-filter"] }
 url = "=2.2.2"
 
 [dev-dependencies]