The "Running" status for the top-level workflow is a bit mis-leading in
this case. In the homepage, or in the list of workflows, there's an
additional icon which tries to provide extra information about the
"running status" of workflows and here it shows "I" for "Input needed".
If you open the workflow page
(https://debusine.debian.net/debian/developers/work-request/131504/), you
will see that all tasks have completed, there's only one "Running" task
and it's actually the "Sign" task which is waiting on you to provide
the signature.