small change to ncores and local instruction for cluster

xfel_calibrate/notebooks.py

@@ -80,7 +80,7 @@ notebooks = {
                                "notebook": "notebooks/Tutorial/calversion.ipynb",
                                "concurrency": {"parameter": None,
                                                "default concurrency": None,
-                                               "cluster cores": 1},
+                                               "cluster cores": 4},
                                },
                       }