README.md: Change toml format to mention the optional preferred wifi state

README.md

@@ -42,6 +42,11 @@ name = "Rahix' Nick"
 # The submenu where your app should appear
 menu = "Badge"
 
+# OPTIONAL: If your app prefers wifi to be off or on when entering.
+# Useful if you want more resources (false) or need wifi (true).
+# Remove if you don't want to change wifi state!
+wifi_preference = false
+
 [entry]
 # The name of your entry point `Application` class
 class = "NickApp"