README: minor cleanup

README.md

@@ -1,6 +1,6 @@
 # MMGen Wallet
 
-##### An online/offline cryptocurrency wallet for the command line
+##### A terminal-based online/offline cryptocurrency wallet
 
 ![build](https://github.com/mmgen/mmgen-wallet/workflows/build/badge.svg)
 ![ruff](https://github.com/mmgen/mmgen-wallet/workflows/ruff/badge.svg)