mkosi: update debian commit reference

* 4643263123 Add NEWS entry to warn about network connectivity loss due to mDNS, and workaround
* c995755707 Update changelog for 257.4-9 release
* 5e2ba1a045 resolved: break mDNS, remove conflict with avahi
* 6cf6fa39b4 Update changelog for 257.4-8 release
* 5067878f3a reintroduce systemd-resolved, with conflict on avahi-daemon
* 60c0d67e45 d/rules: drop nscd meson option
* 542de2ed44 Install new files for upstream CI
* 1e9b0e30da d/t/boot-and-services: skip gdm3 test in nested LXD run
* 4142fb487b systemd.preinst: fix shellcheck warnings
* 7879441e78 systemd.preinst: do not use systemctl
* 1d5ba16cf0 Update changelog for 257.4-7 release
* ddd3438e04 autopkgtest: re-enable integration tests
* 98698b582f autopkgtest: fix debugging leftover
* f62660777f Backport patches to fix integration tests skipping
* b7308013af autopkgtest: when nested tests-in-lxd skips don't fail outer run
* d5e96c6e56 Update changelog for 257.4-6 release
* 2493e2ffc7 Add Lintian override for 'unknown-field Protected'
* e27ebff834 d/control: fix systemd-boot and systemd-boot-tools descriptions
* 705fff1663 systemd: conflict with dracut on arm64
* 7e92bc39e9 Update changelog for 257.4-5 release
* 7638a4dcc1 autopkgtest: fix unit-tests for upstream CI
* 83a6bbe55a Add missing dh-exec shbang to d/systemd-tests.install
* 11b82593a5 Update changelog for 257.4-4 release
* f221a72abd Drop systemd-nspawn on arm64
* b8ecb66d05 Drop systemd-resolved package
* 560cde98d7 Move leftover resolved files to its own package
* fc2758d02d autopkgtest: drop versioning constraints on tzdata
* b2b7c59141 autopkgtest: remove workaround for 'meson compiile mkosi' and use 'mkosi -f' instead to avoid slow rebuilds
* 17e11869b5 systemd.postinst: add markers for janitor removals
* 581a5994f5 Handle new tmp mount on upgrade in preinst rather than postinst
* 58f6a4f689 d/control: only conflict against opensysusers << 0.7.3-4.1~
* 6dee609537 userdb: fix wildcard matching
* cf722bcd44 systemd-container: use more wildcards to install files
* 2339308f43 userdbd: use wildcard to install units
* a663f671bd Add myself to Uploaders
* 4a5bef9a48 Install new files
* c529659001 Drop systemd-cgroups-agent with upstream profile
* 970061c678 d/rules: add TODO reminder to drop Ubuntu-specific workaround
* 88fc574439 systemd-boot: do case-insensitive parsing of efibootmgr output
* eecb9466e0 Update tzdata-legacy version constraint for new bookworm-p-u tzdata version
* 5d9570efad Update changelog for 257.4-3 release
* 614efde487 Fix versioned breaks/replaces for sd-boot-tools

mkosi/mkosi.conf.d/debian-ubuntu/mkosi.conf.d/pkgenv.conf

@@ -9,5 +9,5 @@ Environment=
         GIT_URL=https://salsa.debian.org/systemd-team/systemd.git
         GIT_SUBDIR=debian
         GIT_BRANCH=debian/master
-        GIT_COMMIT=d8c7f8f7f461b1edc3bf5040509e697ea574c990
+        GIT_COMMIT=46432631232015b78071f84e5a3fb944621c83f7
         PKG_SUBDIR=debian