With the merging of [1] we observed that the images built
(python-3.{9,10,11}-bookworm) were not then promoted. This was fixed
in [2] as the assumption is that the promotion jobs didn't trigger
because the files modified in [1] don't match the needed files. This
change adds the zuul configuration file to the list of relevant files.
We're not 100% sure that this will work but it's worth a try.
[1] https://review.opendev.org/c/opendev/system-config/+/888102
[2] https://review.opendev.org/c/opendev/system-config/+/888633
Change-Id: I958a0af6fbad80f8152438aaee6b7268432f64d5