update the config text and the tracking pixel

how-to-use-azureml/machine-learning-pipelines/intro-to-pipelines/aml-pipelines-parameter-tuning-with-hyperdrive.ipynb

@@ -8,6 +8,13 @@
         "Licensed under the MIT License."
       ]
     },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+          "![Impressions](https://PixelServer20190423114238.azurewebsites.net/api/impressions/MachineLearningNotebooks/how-to-use-azureml/machine-learning-pipelines/intro-to-pipelines/aml-pipelines-parameter-tuning-with-hyperdrive.png)"
+         ] 
+    },
     {
       "cell_type": "markdown",
       "metadata": {},
@@ -50,7 +57,7 @@
       "source": [
         "## Initialize workspace\n",
         "\n",
-        "Initialize a workspace object from persisted configuration. Make sure the config file is present at .\\config.json"
+        "Initialize a workspace object from persisted configuration. If you are using an Azure Machine Learning Notebook VM, you are all set. Otherwise, make sure the config file is present at .\\config.json"
       ]
     },
     {
@@ -434,4 +441,4 @@
   },
   "nbformat": 4,
   "nbformat_minor": 2
-}
+}