zeroize: Update comments on MSRV (#896)

Author: aewag

zeroize/src/aarch64.rs

@@ -1,7 +1,7 @@
 //! [`Zeroize`] impls for ARM64 SIMD registers.
 //!
 //! Gated behind the `aarch64` feature: MSRV 1.59
-//! (the overall crate is MSRV 1.51)
+//! (the overall crate is MSRV 1.56)
 
 use crate::{atomic_fence, volatile_write, Zeroize};
 

zeroize/src/lib.rs

@@ -30,7 +30,7 @@
 //!
 //! ## Minimum Supported Rust Version
 //!
-//! Requires Rust **1.51** or newer.
+//! Requires Rust **1.56** or newer.
 //!
 //! In the future, we reserve the right to change MSRV (i.e. MSRV is out-of-scope
 //! for this crate's SemVer guarantees), however when we do it will be accompanied