Update release notes

Author: RafaelKayumov

RELEASE-NOTES.txt

@@ -12,6 +12,7 @@
 - [*] Shipping Labels: Update mark order completed toggle on purchase form [https://github.com/woocommerce/woocommerce-ios/pull/15917]
 - [*] Shipping Labels: Optimize data loading on purchase form [https://github.com/woocommerce/woocommerce-ios/pull/15919]
 - [internal] Optimized assets for app size reduction [https://github.com/woocommerce/woocommerce-ios/pull/15881]
+- [*] Shipping Labels: Allow dots in HS tariff number input field for customs settings [https://github.com/woocommerce/woocommerce-ios/pull/15933]
 
 22.8
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