Fix punctuation in short description of Quickshell topic

Author: E3nviction

topics/quickshell/index.md

@@ -5,7 +5,7 @@ display_name: Quickshell
 github_url: https://github.com/quickshell-mirror
 logo: quickshell.png
 released: April 20 2025
-short_description: Quickshell is a QtQuick-based toolkit for building desktop components alongside your Wayland compositor or window manager
+short_description: Quickshell is a QtQuick-based toolkit for building desktop components alongside your Wayland compositor or window manager.
 topic: quickshell
 related: qt
 url: https://www.quickshell.org/