Fix YARD annotation to match arguments

[olleolleolle]

• Avoid [UnknownParam] @param tag has unknown parameter name: type

Details

lib/notiffany/notifier/emacs.rb:39: [UnknownParam] @param tag has unknown parameter name: type
lib/notiffany/notifier/emacs.rb:41: [UnknownParam] @param tag has unknown parameter name: title
lib/notiffany/notifier/emacs.rb:43: [UnknownParam] @param tag has unknown parameter name: image