package/clamav: security bump to version 0.103.10
Release notes:
https://blog.clamav.net/2023/08/clamav-120-feature-version-and-111-102.html
Fixes CVE-2023-40477:
"Upgrade the bundled UnRAR library (libclamunrar) to version 6.2.10."
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>