Update src/pages/messaging/agent-chat-api/index.mdx

Co-authored-by: oliwiapolec <54406259+oliwiapolec@users.noreply.github.com>

Author: GGuinea

src/pages/messaging/agent-chat-api/index.mdx

@@ -1906,7 +1906,7 @@ Returns the info about the customer with a given `id`.
 | `statistics`     | object    | Counters for started threads, opened pages, etc.                                                                                  |
 | `visit`          | object    | Geolocation and opened pages from the customer's most recent online visit. Returned only if the customer logged in at least once. |
 | `chat_ids`       | []string  | IDs of a customer's chats. Returned only if the customer had at least one chat.                                                   |
-| `omnichannel`    | object    | An object of customer's omnichannel data.											   |
+| `omnichannel`    | object    | An object of the customer's [omnichannel data](/messaging/agent-chat-api/data-structures/#customer).											   |
 
 </Text>
 <Code>