Update release notes

Author: adborbas

RELEASE-NOTES.txt

@@ -5,6 +5,7 @@
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 - [**] We added support for collecting in-person payments (including Tap To Pay) using Stripe Payment Gateway extension in the UK. [https://github.com/woocommerce/woocommerce-ios/pull/16287]
 - [*] Improve card payments onboarding error handling to show network errors correctly [https://github.com/woocommerce/woocommerce-ios/pull/16304]
+- [*] Fix product variation selection for order creation [https://github.com/woocommerce/woocommerce-ios/pull/16317]
 
 23.6
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