fixed spelling mistake

solutions/object_oriented_design/online_chat/online_chat.ipynb

@@ -36,7 +36,7 @@
     "        * Post a message to a group chat\n",
     "    * Private 1-1 chat\n",
     "        * Invite a friend to a private chat\n",
-    "        * Post a meesage to a private chat\n",
+    "        * Post a message to a private chat\n",
     "* No need to worry about scaling initially"
    ]
   },
@@ -51,7 +51,10 @@
    "cell_type": "code",
    "execution_count": 1,
    "metadata": {
-    "collapsed": false
+    "collapsed": false,
+    "jupyter": {
+     "outputs_hidden": false
+    }
    },
    "outputs": [
     {
@@ -149,7 +152,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -163,9 +166,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.12.6"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 0
+ "nbformat_minor": 4
 }