Update README to call the application "Chats"
Per https://source.puri.sm/Librem5/chatty/-/blob/master/data/sm.puri.Chatty.desktop.in, the application's name is "Chats", not "Chatty" - can the README title be updated to reflect this?
I'd suggest that chatty
should just be used for the project name/binary, similar to the nautilus/Files split.