Fix wording in action 'Switch to Screen'

This erroneous "Window" instead of "Switch" apparently broke stuff.

The issue was pointed out on Reddit here: [https://www.reddit.com/r/kde/comments/y78qps/comment/istrj6t/](https://www.reddit.com/r/kde/comments/y78qps/comment/istrj6t/)


(cherry picked from commit 02145bdd)