WIP: docs(demo): fix year

Author: mlopezFC

src/test/java/com/flowingcode/vaadin/addons/chatassistant/ChatAssistantGenerativeDemo.java

@@ -2,7 +2,7 @@
  * #%L
  * Chat Assistant Add-on
  * %%
- * Copyright (C) 2023 - 2024 Flowing Code
+ * Copyright (C) 2023 - 2025 Flowing Code
  * %%
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.