doc: multi agent collaboration. fix tavily and setup (#1352)

Author: saba-ch

examples/multi_agent/multi_agent_collaboration.ipynb

@@ -43,6 +43,40 @@
     "// process.env.LANGCHAIN_PROJECT = \"Multi-agent Collaboration: LangGraphJS\";\n"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "b6686ec7",
+   "metadata": {},
+   "source": [
+    "## Setup\n",
+    "\n",
+    "### Load env vars\n",
+    "\n",
+    "Add a `.env` variable in the root of the repo folder with your variables."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8af329ba",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import \"dotenv/config\";"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b84a81aa",
+   "metadata": {},
+   "source": [
+    "### Install dependencies\n",
+    "\n",
+    "```bash\n",
+    "npm install @langchain/core @langchain/openai @langchain/langgraph @langchain/tavily zod canvas d3 tslab\n",
+    "```"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "5e4344a7-21df-4d54-90d2-9d19b3416ffb",
@@ -158,13 +192,13 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": null,
    "id": "ca076f3b-a729-4ca9-8f91-05c2ba58d610",
    "metadata": {},
    "outputs": [],
    "source": [
     "import \"tsx\"; // Only for running this in TSLab. See: https://github.com/yunabe/tslab/issues/72\n",
-    "import { TavilySearchResults } from \"@langchain/community/tools/tavily_search\";\n",
+    "import { TavilySearch } from \"@langchain/tavily\";\n",
     "import { tool } from \"@langchain/core/tools\";\n",
     "import * as d3 from \"d3\";\n",
     "// ----------ATTENTION----------\n",
@@ -266,7 +300,7 @@
     "  }\n",
     ")\n",
     "\n",
-    "const tavilyTool = new TavilySearchResults();"
+    "const tavilyTool = new TavilySearch();"
    ]
   },
   {