docs(ops/irccat): link to credentials RFE r/3244

https://cl.tvl.fyi/c/depot/+/4264 did move merging config with secrets
into ExecStart=, which is tracked in an RFE upstream:

https://github.com/systemd/systemd/issues/19604#issuecomment-989279884

We didn't link to this so far, neither in the commit message, nor in a
comment.

Let's add a comment, so people know when we can undo this.

Change-Id: I7bed370b671093bb876592b4dccd562f1c256cd2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4326
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: grfn <grfn@gws.fyi>

0 files changed, 0 insertions, 0 deletions