Update README.md for GitHub Package Registry

Author: bnb

README.md

@@ -1,9 +1,9 @@
 It's me, Tierney!
 
 # Usage
-Via npx:
+Assuming you have the GitHub registry set up, you can use via npx:
 ```
-npx bitandbang
+npx @bnb/card
 ```
 
 Not including how to use it globally because I'm not sure why you'd want this as a global command. That'd be creepy.