fix(panettone): always use displayname in subjects r/2459

Emails for (re)opening and closing where send out with the user's DN in
the subject which is probably not what we want.

Using displayname-if-known is probably not necessary as there is not
really a case where (not *user*) wouldn't justify a 500 in this context.

Change-Id: Id12d3d9619f42eb5337c2d3482b7c1646b5d6a81
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2911
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

0 files changed, 0 insertions, 0 deletions