[postinstall] Update to v1.2023121409

Update postinstall to deploy montcalm-10 SSH key.

data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-1.json

@@ -237,7 +237,7 @@
   },
   "software": {
     "forced-deployment-timestamp": 202007300948,
-    "postinstall-version": "1.2023112409",
+    "postinstall-version": "1.2023121409",
     "standard-environment": "debian11-x64-std"
   },
   "storage_devices": [