Fix discovery demo (#250)

* updating README and docs [skip ci]

* fix: upgrade protobuf (required for Binder)

notebooks/discovery-demo.ipynb

@@ -16,6 +16,16 @@
    "id": "d6a65c61",
    "metadata": {},
    "outputs": [],
+   "source": [
+    "!pip install --upgrade protobuf"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "94cd4c8c",
+   "metadata": {},
+   "outputs": [],
    "source": [
     "from typing import List\n",
     "from rdkit import Chem\n",
@@ -2325,7 +2335,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },