Update release notes

Author: Ecarrion

RELEASE-NOTES.txt

@@ -2,6 +2,7 @@
 
 10.4
 -----
+- [***] Stats: Now you can add a Today's Stats Widget to your homescreen to monitor your sales. [https://github.com/woocommerce/woocommerce-ios/pull/7732]
 - [*] Help center: Added help center web page with FAQs for "Pick a WooCommerce Store" screen. [https://github.com/woocommerce/woocommerce-ios/pull/7641]
 - [*] In-Person Payments: Fixed a bug where cancelling a card reader connection would temporarily prevent further connections [https://github.com/woocommerce/woocommerce-ios/pull/7689]
 - [*] In-Person Payments: Improvements to the card reader connection flow UI [https://github.com/woocommerce/woocommerce-ios/pull/7687]