Added mention about the update

Author: mnocon

docs/release_notes/ibexa_dxp_v4.6.md

@@ -29,6 +29,9 @@ The PHP API has been enhanced with the following new classes:
 - [`Ibexa\Contracts\DiscountsCodes\Value\DiscountCodeUsageInterface`](https://doc.ibexa.co/en/latest/api/php_api/php_api_reference/classes/Ibexa-Contracts-DiscountsCodes-Value-DiscountCodeUsageInterface.html)
 - [`Ibexa\Contracts\DiscountsCodes\Value\DiscountCodeUser`](https://doc.ibexa.co/en/latest/api/php_api/php_api_reference/classes/Ibexa-Contracts-DiscountsCodes-Value-DiscountCodeUser.html)
 - [`Ibexa\Contracts\DiscountsCodes\Value\Query\DiscountCodeUsageQuery`](https://doc.ibexa.co/en/latest/api/php_api/php_api_reference/classes/Ibexa-Contracts-DiscountsCodes-Value-Query-DiscountCodeUsageQuery.html )
+
+To update to the latest version, see the [update instructions](update_from_4.6.md#lts-updates).
+
 [[= release_note_entry_end() =]]
 
 [[= release_note_entry_begin("Ibexa DXP " + version, '2025-05-27', ['Headless', 'Experience', 'Commerce']) =]]