D9874: Fix executable name in README

[Pali Rohár]

pali added a comment.


  done.

REPOSITORY
  R105 KDE SSH Password Dialog

REVISION DETAIL
  https://phabricator.kde.org/D9874

To: pali, apol
Cc: cfeck, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, sebas, apol, mart