Update Rust crate tokio to 1.22 (#120)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [tokio](https://tokio.rs) ([source](https://togithub.com/tokio-rs/tokio)) | dependencies | minor | `1.21` -> `1.22` |

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Co-authored-by: Sebastian Bernauer <[email protected]>

Author: renovate[bot]

Cargo.lock

@@ -17,7 +17,7 @@ serde_json = "1.0"
 snafu = "0.7"
 stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "0.27.1" }
 strum = { version = "0.24", features = ["derive"] }
-tokio = { version = "1.21", features = ["macros", "rt-multi-thread"] }
+tokio = { version = "1.22", features = ["macros", "rt-multi-thread"] }
 tracing = "0.1"
 
 [build-dependencies]