fix (slurmctld): fix the resume action.

This commit modifies the command run by the *resume* action. The previous command
set the state argument as *resume*, which was leading to the error *slurm_update error: Invalid node state specified*.

charms/slurmctld/src/charm.py

@@ -204,7 +204,7 @@ def _on_resume_nodes_action(self, event: ActionEvent) -> None:
         event.log(f"Resuming {nodes}.")
 
         try:
-            cmd = f"scontrol update nodename={nodes} state=resume"
+            cmd = f"scontrol update nodename={nodes} state=idle"
             subprocess.check_output(shlex.split(cmd))
             event.set_results({"status": "resuming", "nodes": nodes})
         except subprocess.CalledProcessError as e: