appimage build: fix dead link for appimagetool

they really want us to merge the migration to the new tool :D
#10019

Author: SomberNight

contrib/build-linux/appimage/make_appimage.sh

@@ -37,7 +37,7 @@ info "downloading some dependencies."
 download_if_not_exist "$CACHEDIR/functions.sh" "https://raw.githubusercontent.com/AppImage/pkg2appimage/$PKG2APPIMAGE_COMMIT/functions.sh"
 verify_hash "$CACHEDIR/functions.sh" "8f67711a28635b07ce539a9b083b8c12d5488c00003d6d726c7b134e553220ed"
 
-download_if_not_exist "$CACHEDIR/appimagetool" "https://github.com/AppImage/AppImageKit/releases/download/13/appimagetool-x86_64.AppImage"
+download_if_not_exist "$CACHEDIR/appimagetool" "https://github.com/AppImage/AppImageKit/releases/download/13/obsolete-appimagetool-x86_64.AppImage"
 verify_hash "$CACHEDIR/appimagetool" "df3baf5ca5facbecfc2f3fa6713c29ab9cefa8fd8c1eac5d283b79cab33e4acb"
 # TODO migrate to https://github.com/AppImage/appimagetool/releases
 #      note: we will also have to build AppImage/type2-runtime, as otherwise new appimagetool just downloads "latest" from the internet.