chacha20: Add a docs heading

Like we do for the other crates add a heading to the crate docs.
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Tobin C. Harding 2025-03-03 13:32:15 +11:00
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@ -1,5 +1,7 @@
// SPDX-License-Identifier: CC0-1.0
//! # ChaCha20 - Poly1305
//!
//! Combine the ChaCha20 stream cipher with the Poly1305 message authentication code
//! to form an authenticated encryption with additional data (AEAD) algorithm.
#![no_std]