clamav: Update to 0.104.2

clamav: Update to 0.104.2

For details see:
https://blog.clamav.net/2022/01/clamav-01035-and-01042-security-patch.html

"ClamAV 0.104.2 is a critical patch release with the following fixes:

CVE-2022-20698: Fix for invalid pointer read that may cause a crash.
Affects 0.104.1, 0.103.4 and prior when ClamAV is compiled with libjson-c
and the CL_SCAN_GENERAL_COLLECT_METADATA scan option (the clamscan
--gen-json option) is enabled.
..."

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>