package/clamav: bump to version 0.103.4
ClamAV 0.103.4 is a critical patch release:
https://blog.clamav.net/2021/11/clamav-01034-and-01041-patch-releases.html
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>