Bump zeroize from 1.1.1 to 1.2.0 (#7731)

Bumps [zeroize](https://github.com/iqlusioninc/crates) from 1.1.1 to 1.2.0.
- [Release notes](https://github.com/iqlusioninc/crates/releases)
- [Commits](https://github.com/iqlusioninc/crates/compare/zeroize/v1.1.1...zeroize/v1.2.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

substrate/client/network/Cargo.toml

@@ -61,7 +61,7 @@ thiserror = "1"
 unsigned-varint = { version = "0.5.0", features = ["futures", "futures-codec"] }
 void = "1.0.2"
 wasm-timer = "0.2"
-zeroize = "1.0.0"
+zeroize = "1.2.0"
 
 [dependencies.libp2p]
 version = "0.32.2"