update introduction.ipynb

Author: Dou Du

examples/introduction.ipynb

@@ -305,18 +305,16 @@
    ]
   },
   {
-   "cell_type": "markdown",
+   "cell_type": "code",
+   "execution_count": null,
    "metadata": {},
-   "source": [
-    "This work has been done with the support of the EPFL Open Science Fund [OSSCAR](http://www.osscar.org).\n",
-    "\n",
-    "<img src=\"http://www.osscar.org/wp-content/uploads/2019/03/OSSCAR-logo.png\" style=\"height:40px; width: 200px\"/>"
-   ]
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -330,10 +328,10 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.7"
+   "version": "3.9.12"
   },
   "voila": {
-    "authors": "Dou Du, Casper Welzel Andersen and Giovanni Pizzi"  
+   "authors": "Dou Du, Casper Welzel Andersen and Giovanni Pizzi"
   }
  },
  "nbformat": 4,