Update location of AppImageUpdate

Author: probonopd

README.md

@@ -21,11 +21,11 @@ chmod a+x Subsurface-4.5.1.449-x86_64.AppImage
 ./Subsurface-4.5.1.449-x86_64.AppImage
 
 # Get the updater
-wget http://bintray.com/artifact/download/probono/AppImages/AppImageUpdate-443.g69bf471-x86_64.AppImage
-chmod a+x AppImageUpdate-443.g69bf471-x86_64.AppImage
+wget https://github.com/AppImage/AppImageUpdate/releases/download/continuous/AppImageUpdate-x86_64.AppImage
+chmod a+x AppImageUpdate-x86_64.AppImage
 
 # Update Subsurface to the latest version
-./AppImageUpdate-443.g69bf471-x86_64.AppImage ./Subsurface-4.5.1.449-x86_64.AppImage
+./AppImageUpdate-x86_64.AppImage ./Subsurface-4.5.1.449-x86_64.AppImage
 
 # Look there is a newer version! Run it
 NEW=$(ls Subsurface-*.AppImage | sort -V | tail -n 1)