Update release notes for app version 20.4 (#13959)

Author: itsmeichigo

CHANGELOG.md

@@ -1,6 +1,9 @@
 <!--
 Contains editorialized release notes. Raw release notes should go into `RELEASE-NOTES.txt`.
 -->
+## 20.4
+In this version we've fixed an issue related to the onboarding of payments. Blaze ads management has also been enhanced for better experiences.
+
 ## 20.3
 In this version, we've enabled scanning order tracking numbers and improved product password management. We've also added enhancements for product scanner, cash payments and discounts. 
 Blaze ads campaign creation has been updated with a better experience for image picking and budget settings.

WooCommerce/Resources/release_notes.txt

@@ -1,9 +1,3 @@
-- [Internal] Mark order notification read if needed on watch app and notification extension https://github.com/woocommerce/woocommerce-ios/pull/13896
-- [*] Blaze: Enhanced the layout of the campaign list item. [https://github.com/woocommerce/woocommerce-ios/pull/13934]
-- [*] Fixed the incorrect navigation title of the product selector in the Blaze campaign creation flow. [https://github.com/woocommerce/woocommerce-ios/pull/13903]
-- [*] Payments: Fixed an issue to ensure the payment onboarding state is reset after logout and login. [https://github.com/woocommerce/woocommerce-ios/pull/13897]
-- [*] Blaze: Handle links on the campaign detail web view natively. [https://github.com/woocommerce/woocommerce-ios/pull/13922]
-- [*] Blaze: Open blaze campaign detail page upon tapping push notification. [https://github.com/woocommerce/woocommerce-ios/pull/13843]
-- [internal] Updated dependencies for Xcode 16 Support [https://github.com/woocommerce/woocommerce-ios/pull/13911]
+In this version we've fixed an issue related to the onboarding of payments. Blaze ads management has also been enhanced for better experiences.