fix(medusa): Fix regression in job scheduler service (#3335)

The queue registration of jobs has stopped working due to a small issue in how the jobs are added to the queue.

Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

.changeset/green-crabs-fly.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/medusa": patch
+---
+
+fix(medusa): Fix regression in job scheduler service