[Docs] Add ruff linting to .ipynb files (#645)

examples/async.ipynb

@@ -57,8 +57,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import os\n",
     "import getpass\n",
+    "import os\n",
     "\n",
     "\n",
     "def _set_env(var: str):\n",
@@ -113,8 +113,10 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from typing_extensions import TypedDict\n",
     "from typing import Annotated\n",
+    "\n",
+    "from typing_extensions import TypedDict\n",
+    "\n",
     "from langgraph.graph.message import add_messages\n",
     "\n",
     "# Add messages essentially does this with more\n",
@@ -306,7 +308,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from langgraph.graph import StateGraph, END\n",
+    "from langgraph.graph import END, StateGraph\n",
     "\n",
     "# Define a new graph\n",
     "workflow = StateGraph(State)\n",