Switch to the non-deprecated Packit job type

‹production_build› has been deprecated for some time and has already been
removed from the Packit schema.

Signed-off-by: Matej Focko <[email protected]>

Author: mfocko

.packit.yaml

@@ -76,7 +76,7 @@ jobs:
       - fedora-development
 
   # create an srpm from upstream and submit a scratch build to koji
-  - job: production_build
+  - job: upstream_koji_build
     trigger: release
     targets:
       - fedora-latest-stable