Fix comments in encryption/decryption headers

Signed-off-by: Jakub Jelen <[email protected]>

Author: Jakuje

cryptoki/src/session/message_decryption.rs

@@ -1,6 +1,6 @@
 // Copyright 2025 Contributors to the Parsec project.
 // SPDX-License-Identifier: Apache-2.0
-//! Encrypting data
+//! Decrypting messages
 
 use crate::context::Function;
 use crate::error::{Result, Rv};

cryptoki/src/session/message_encryption.rs

@@ -1,6 +1,6 @@
 // Copyright 2025 Contributors to the Parsec project.
 // SPDX-License-Identifier: Apache-2.0
-//! Encrypting data
+//! Encrypting messages
 
 use crate::context::Function;
 use crate::error::{Result, Rv};