patch 9.1.2042: filetype: systemd quadlet files are not recognized

patch 9.1.2042: filetype: systemd quadlet files are not recognized

Problem:  filetype: systemd quadlet files are not recognized
Solution: Detect additional patterns as systemd filetype
          (Ac5000)

Reference:
- https://docs.podman.io/en/latest/markdown/podman.1.html
- https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html
- https://docs.podman.io/en/latest/markdown/podman-quadlet.1.html

fixes:  #15078
closes: #19057

Signed-off-by: Ac5000 <15003210+Ac5000@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>