package/imagemagick: security bump to version 7.0.11-13
Fix CVE-2021-20309 to CVE-2021-20313
https://github.com/ImageMagick/ImageMagick/blob/7.0.11-13/ChangeLog
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>