refactor: addition of note to test in disconnected env

Author: dimakis

Diff for: demo-notebooks/guided-demos/2_basic_jobs.ipynb

@@ -203,7 +203,9 @@
    "id": "31096641",
    "metadata": {},
    "source": [
-    "Now, an alternative option for job submission is to submit directly to MCAD, which will schedule pods to run the job with requested resources:"
+    "Now, an alternative option for job submission is to submit directly to MCAD, which will schedule pods to run the job with requested resources:\n",
+    "\n",
+    "NOTE: To test this demo in an air-gapped/ disconnected environment alter the training script to use a local dataset."
    ]
   },
   {
@@ -216,6 +218,7 @@
     "jobdef = DDPJobDefinition(\n",
     "    name=\"mnistjob\",\n",
     "    script=\"mnist.py\",\n",
+    "    # script=\"mnist_disconnected.py\", # training script for disconnected environment\n",
     "    scheduler_args={\"namespace\": \"default\"},\n",
     "    j=\"1x1\",\n",
     "    gpu=0,\n",