docs: Add partition parameter to DashVector (#19385)

**Description**: Add `partition` parameter to DashVector
dashvector.ipynb
**Related PR**: https://github.com/langchain-ai/langchain/pull/19023
**Twitter handle**: @CailinWang_

---------

Co-authored-by: root <root@Bluedot-AI>

docs/docs/integrations/vectorstores/dashvector.ipynb

@@ -202,14 +202,41 @@
     "print(docs)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Operating band `partition` parameters"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "The `partition` parameter defaults to default, and if a non-existent `partition` parameter is passed in, the `partition` will be created automatically. "
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "collapsed": false
-   },
+   "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "texts = [\"foo\", \"bar\", \"baz\"]\n",
+    "metadatas = [{\"key\": i} for i in range(len(texts))]\n",
+    "ids = [\"0\", \"1\", \"2\"]\n",
+    "partition = \"langchain\"\n",
+    "\n",
+    "# add texts\n",
+    "dashvector.add_texts(texts, metadatas=metadatas, ids=ids, partition=partition)\n",
+    "\n",
+    "# similarity search\n",
+    "query = \"What did the president say about Ketanji Brown Jackson\"\n",
+    "docs = dashvector.similarity_search(query, partition=partition)\n",
+    "\n",
+    "# delete\n",
+    "dashvector.delete(ids=ids, partition=partition)"
+   ]
   }
  ],
  "metadata": {
@@ -228,7 +255,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.4"
+   "version": "3.11.6"
   }
  },
  "nbformat": 4,