ci: Run production tests when files mentioning zilencer are changed.
ci: Run production tests when files mentioning zilencer are changed.

Production installs do not use the zilencer application, but the tests
do include it; as such, changes to any files which reference zilencer
are more likely to pass tests but fail production installs.

Run production tests when those files are changed.

rht/zulip,kou/zulip,eeshangarg/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,rht/zulip,andersk/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,rht/zulip,kou/zulip,rht/zulip,zulip/zulip,kou/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,rht/zulip,zulip/zulip,kou/zulip,zulip/zulip,zulip/zulip,andersk/zulip,zulip/zulip,andersk/zulip,andersk/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,kou/zulip,zulip/zulip