style: fix ruff linting errors in docs

Author: dominikpeter

docs/cookbook.ipynb

@@ -206,7 +206,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import asyncio\n",
     "import httpxr\n",
     "\n",
     "\n",
@@ -374,6 +373,7 @@
    "outputs": [],
    "source": [
     "import logging\n",
+    "\n",
     "import httpxr\n",
     "\n",
     "logging.basicConfig(level=logging.INFO)\n",
@@ -414,6 +414,7 @@
    "outputs": [],
    "source": [
     "import json\n",
+    "\n",
     "import httpxr\n",
     "\n",
     "with httpxr.Client() as client:\n",
@@ -512,12 +513,13 @@
    "outputs": [],
    "source": [
     "import json\n",
-    "import httpxr\n",
-    "from httpxr.sse import connect_sse\n",
     "\n",
     "# Requires a valid OPENAI_API_KEY in the environment\n",
     "import os\n",
     "\n",
+    "import httpxr\n",
+    "from httpxr.sse import connect_sse\n",
+    "\n",
     "api_key = os.environ.get(\"OPENAI_API_KEY\", \"\")\n",
     "if not api_key:\n",
     "    print(\"⚠  Set OPENAI_API_KEY to run this cell\")\n",
@@ -589,6 +591,7 @@
    "source": [
     "try:\n",
     "    import orjson\n",
+    "\n",
     "    import httpxr\n",
     "\n",
     "    with httpxr.Client() as client:\n",