fix type for execution

Author: rbs333

docs/user_guide/vectorizers_04.ipynb

@@ -762,7 +762,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 17,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -781,9 +781,10 @@
    "source": [
     "# load expects an iterable of dictionaries where\n",
     "# the vector is stored as a bytes buffer\n",
+    "from redisvl.redis.utils import array_to_buffer\n",
     "\n",
     "data = [{\"text\": t,\n",
-    "         \"embedding\": v}\n",
+    "         \"embedding\": array_to_buffer(v, dtype=\"float32\")}\n",
     "        for t, v in zip(sentences, embeddings)]\n",
     "\n",
     "index.load(data)"