Fix typos for "Show line count"
Test Plan:
- Open kate
- Right click on status bar to get the context menu OR goto configure kate -> appearance
- Show Lines Count -> to Show line count
Reviewers: cullmann, vkrause
Reviewed By: cullmann
Subscribers: kwrite-devel, kde-frameworks-devel
Tags: KTextEditor, Kate, Frameworks
Differential Revision: https://phabricator.kde.org/D15127