deps: bump zeroize from 1.6.0 to 1.7.0

Pull-Request: libp2p#4904.

Author: dependabot[bot]

Cargo.lock

@@ -27,7 +27,7 @@ serde = { version = "1", optional = true, features = ["derive"] }
 sha2 = { version = "0.10.8", optional = true }
 thiserror = { version = "1.0", optional = true }
 void = { version = "1.0", optional = true }
-zeroize = { version = "1.6", optional = true }
+zeroize = { version = "1.7", optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 ring = { version = "0.17.5", features = [ "alloc", "std"], default-features = false, optional = true }