getSender() returns a user ID instead of a bot ID

When the bot receives an incoming message from itself in the **Heard** middleware, `$message->getSender()` returns a user Telegram ID instead of a bot Telegram ID.

In the example below, I log messages from bots:

```php
if (data_get($message->getPayload(), 'from.is_bot') === true) {
Log::debug('Catch bot messages.', [
'getSender' => $message->getSender(),
'payload' => $message->getPayload(),
]);
}
```

The incoming message is a bot message. Bot Telegram ID is `2222222222` which is clearly visible in the payload in `from.id`, but `$message->getSender()` for some reason returns a different Telegram ID of `11111111` (which is an ID of a user in that chat):

```json
{
"getSender": 11111111,
"payload": {
"message_id": 1328846,
"from": {
"id": 2222222222,
"is_bot": true,
"first_name": "My bot name",
"username": "somebotname"
},
"chat": {
"id": -3333333333,
"title": "Some chat name",
"type": "group",
"all_members_are_administrators": true,
"accepted_gift_types": {
"unlimited_gifts": false,
"limited_gifts": false,
"unique_gifts": false,
"premium_subscription": false
}
},
"date": 1757250577,
"text": "Bot response"
}
}
```