Fix assign-to-user job not being invoked on workflow_dispatch

The assign_to_user job requires `target: "*"` when triggered via
workflow_dispatch since there's no issue context. Without this, the
job condition included `(github.event.issue.number)` which evaluates
to falsy on workflow_dispatch events.

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

.github/workflows/dev.lock.yml

@@ -15,6 +15,7 @@ tools:
 safe-outputs:
   assign-to-user:
     allowed: [mrjf]
+    target: "*"
 ---
 # Dependency Issue Assignment