fix license header mail format

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/java/com/nextcloud/talk/adapters/items/ConversationItem.java

@@ -4,7 +4,7 @@
  * @author Mario Danic
  * @author Andy Scherzinger
  * @author Marcel Hibbe
- * Copyright (C) 2022 Marcel Hibbe (dev@mhibbe.de)
+ * Copyright (C) 2022 Marcel Hibbe <dev@mhibbe.de>
  * Copyright (C) 2021 Andy Scherzinger <info@andy-scherzinger.de>
  * Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
  *