Update release notes

Author: samiuelson

RELEASE-NOTES.txt

@@ -6,6 +6,7 @@
 - [internal] Remove oldest (<30) core data models [https://github.com/woocommerce/woocommerce-ios/pull/15987]
 - [*] Jetpack setup: Native experience for the connection step [https://github.com/woocommerce/woocommerce-ios/pull/15983]
 - [*] Payments: Updated the In-Person Payments `Learn More` redirection to display the correct page based on the selected payment provider [https://github.com/woocommerce/woocommerce-ios/pull/15998]
+- [*] Add "POS" label in Most recent orders in My store dashboard [https://github.com/woocommerce/woocommerce-ios/pull/16006]
 
 23.0
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