delete_package.py: Fix command to add message

Without this it launches an editor to interactively specify the
message which doesn't seem to work from inside the python script

.obs/delete_package.py

@@ -21,7 +21,7 @@ def delete_package_from_workflow(name: str):
 
 
 def delete_package_from_project(name: str):
-    p = subprocess.run(["osc", "rdelete", PROJECT, name], stdout=subprocess.PIPE)
+    p = subprocess.run(["osc", "rdelete", PROJECT, name, "-m \"Deleted via delete_package.py\"" ], stdout=subprocess.PIPE)
     print(p.stdout)
     print(p.stderr)
     p.check_returncode()