added the embeddings part (#8805)

Description: forgot to add the embeddings part in the documentation.
sorry 😅

@baskaryan

docs/extras/integrations/vectorstores/faiss.ipynb

@@ -269,6 +269,20 @@
     "pkl = db.serialize_to_bytes() # serializes the faiss index"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "eb083247",
+   "metadata": {
+    "vscode": {
+     "languageId": "r"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "embeddings = HuggingFaceEmbeddings(model_name=\"all-MiniLM-L6-v2\")"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -276,7 +290,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "db = FAISS.deserialize_from_bytes(pkl) # Load the index"
+    "db = FAISS.deserialize_from_bytes(embeddings = embeddings, serialized = pkl) # Load the index"
    ]
   },
   {