Update whats-new-overview.md

Author: JarbasHorst

concepts/whats-new-overview.md

@@ -34,7 +34,7 @@ Updated the endpoints of the following methods:
 - Updated the [chatMessage: delta](/graph/api/chatmessage-delta) method to use a new endpoint that gets the list of delta messages from all chats in which a user is a participant, including one-on-one chats, group chats, and meeting chats.
 - Use the **reactionContentUrl** property on [chatMessageReaction](/graph/api/resources/chatmessagereaction) to represent the hosted content URL for a custom reaction in a [chatMessage](/graph/api/resources/chatmessage).
 - Use the `<customemoji></customemoji>` tag on the **content** property of the [itemBody](/graph/api/resources/itembody) resource to represent custom emojis in the message body in a [chatMessage](/graph/api/resources/chatmessage).
-Use the **displayName** property on the [chatMessageReaction](/graph/api/resources/chatmessagereaction) resource to represent the reaction name [chatMessage](/graph/api/resources/chatmessage).
+- Use the **displayName** property on [chatMessageReaction](/graph/api/resources/chatmessagereaction) to represent the reaction name in a [chatMessage](/graph/api/resources/chatmessage).
 
 ## October 2024: New in preview only