Update appimagetool.md

Author: ivan-hc

apps/appimagetool.md

@@ -2,7 +2,7 @@
 
  Appimagetool is used to generate an AppImage from an existing AppDir.
 
- SITE: https://github.com/AppImage/AppImageKit
+ SITE: https://github.com/AppImage/appimagetool
 
  | [Applications](https://portable-linux-apps.github.io/apps.html) | [Home](https://portable-linux-apps.github.io)
  | --- | --- |