Add feature note for 5* launching toolbox

README.md

@@ -5,6 +5,8 @@
 
 Just take a screenshot of the recruitment screen and the app will attempt to detect the tags present and show a notification (either with a 4* or better match, or that there is no 4* or better combination).
 
+If a 5* or better recruitment is found, the notification can be tapped to launch the Arknights toolbox to show all the possible combinations. (Note: This uses a mirror of the toolbox I host, rather than the official toolbox)
+
 Has options to attempt to delete screenshots which have recruit tags (note: this may require additional permissions on Android 11), and to clear notifications related to the screenshot (mostly for Samsung devices currently)
 
 ![Settings screenshot](https://i.imgur.com/DBN3Oke_d.webp?maxwidth=760&fidelity=grand)