Update release notes for package selection screen

The release notes are updated to reflect the change in the disabled button text on the package selection screen for shipping labels.

Author: irfano

RELEASE-NOTES.txt

@@ -13,6 +13,7 @@
 - [***] POS: A new settings to customize the POS [https://github.com/woocommerce/woocommerce-android/pull/14527]
 - [*] [Login] Improved the detection of WooCommerce API version during login flow [https://github.com/woocommerce/woocommerce-android/pull/14524]
 - [*] Automatically populate the weight field in the create shipment flow [https://github.com/woocommerce/woocommerce-android/pull/14525]
+- [*] Shipping Labels: Updated the disabled button text on the package selection screen [https://github.com/woocommerce/woocommerce-android/pull/14558]
 
 23.1
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