WooCommerce Product Bundles 8.1.2

* Important: New - Product Bundles now requires Product Add-Ons 6.9+ for the integration between the two plugins to work.
* Fix - Fixed bundle_stock_status enum in REST API.
* Fix - Fixed price data for percentage-based add-ons in discounted bundled items.
* Fix - Resolved an issue that made add-on prices contribute to the total Bundle price even for bundled items that were not 'Priced Individually'.
* Fix - Fixed the use of 'woocommerce_display_product_attributes' filter for displaying variable product attributes in Bundles.

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* Fix - Important: Security improvements.
* Fix - Resolved a compatibility issue with Gravity Forms.
* Fix - Fixed an issue that prevented Bundles from being edited in Subscriptions in admin context.
* New - Tested up to WooCommerce 8.8.