git: Update version from 2.20.1-2+deb10u3 to 2.20.1-2+deb10u4
git: Update version from 2.20.1-2+deb10u3 to 2.20.1-2+deb10u4

This version fixes following CVEs.
- CVE-2021-21300
- CVE-2021-40330

DLA: DLA 3145-1

Signed-off-by: Masami Ichikawa <c2473eda382716382abb3daa8176411f9c82916d@miraclelinux.com>

meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian