add under construction notice

index.ipynb

@@ -7,7 +7,9 @@
    "source": [
     "# Data Science Tutorial\n",
     "\n",
-    "This tutorial covers topics that are relevant or interesting for me for some kind of reason 😄. Have fun!"
+    "This tutorial covers topics that are relevant or interesting for me for some kind of reason 😄. Have fun!\n",
+    "\n",
+    "At the moment this tutorial undergoes "
    ]
   },
   {
@@ -19,7 +21,7 @@
     "\n",
     "Maybe let's start by doing some [text classification](text_classification.ipynb) ([open in google colab](https://colab.research.google.com/github/ephes/data_science_tutorial/blob/main/text_classification.ipynb)).\n",
     "\n",
-    "Is it possible to link directly to [word frequency distribution](http://localhost:8888/lab/tree/text_classification.ipynb#Word-frequency-distribution)?"
+    "Is it possible to link directly to [word frequency distribution](text_classification.ipynb#Word-frequency-distribution)?"
    ]
   },
   {