Update version and add changelog entries for release 9.9.0

Author: github-actions[bot]

changelog.txt

@@ -1,5 +1,21 @@
 *** WooPayments Changelog ***
 
+= 9.9.0 - 2025-09-03 =
+* Fix - fix: adding some missing i18n wrappers
+* Fix - fix: prevent Stripe Link to be shown on the checkout form
+* Fix - Fix checks for the billing details for the BNPL methods on the Pay for Order page.
+* Fix - Fixed WooPay terms and conditions text for merchants using blocks checkout.
+* Fix - Fix VAT setup modal for unsupported merchants
+* Fix - Generate payment method details in WooPayments instead of Woo core, cache them for performance improvements.
+* Fix - Ignore webhooks whenever the order key in their body does not match the local order.
+* Fix - Show Activate payments notice in WooPayments Settings only for test accounts.
+* Update - update: label text on the support phone number in test mode
+* Update - update: settings page design audit.
+* Update - Update WP components for development and tests.
+* Update - Update “Finish setting up WooPayments” task to redirect to NOX flow.
+* Dev - Fix E2E subcription shopper test failures because the core changes text from "Sign up now" to "Add to cart"
+* Dev - Update JS packages mini-css-extract-plugin and shelljs
+
 = 9.8.0 - 2025-08-13 =
 * Add - Add address autocomplete to Checkout
 * Add - Add support for small screens on the evidence submission form.