docs: reference correct parameter names in token functions

Co-authored-by: Hugo Hakim Damer <hdamer@uni-bremen.de>

src/token/mod.rs

@@ -292,7 +292,7 @@ pub trait CoseEncryptCipher {
  add_common_cipher_functionality![Self::EncryptKey];
 }
 
-/// Intended for ciphers which encrypt for multiple recipients.
+/// Intended for ciphers which can encrypt for multiple recipients.
 /// For this purpose, a method must be provided which generates the Content Encryption Key.
 ///
 /// If these recipients each use different key types, you can use an enum to represent them.