Update copyright year

Firstyear · Firstyear · commit ad678eda5272 · 2024-02-20T13:17:00.000+10:00
diff --git a/tss-esapi/examples/aes_encrypt_decrypt.rs b/tss-esapi/examples/aes_encrypt_decrypt.rs
@@ -1,4 +1,4 @@
-// Copyright 2020 Contributors to the Parsec project.
+// Copyright 2024 Contributors to the Parsec project.
 // SPDX-License-Identifier: Apache-2.0
 
 /*

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-// Copyright 2020 Contributors to the Parsec project.`
	`1`	`+// Copyright 2024 Contributors to the Parsec project.`
`2`	`2`	`// SPDX-License-Identifier: Apache-2.0`
`3`	`3`
`4`	`4`	`/*`