docs: fix tavily deprecated warning on crag (#1350)

Author: saba-ch

examples/rag/langgraph_crag.ipynb

@@ -49,7 +49,7 @@
     "### Install dependencies\n",
     "\n",
     "```bash\n",
-    "npm install cheerio zod langchain @langchain/community @langchain/openai @langchain/core @langchain/textsplitters @langchain/langgraph\n",
+    "npm install cheerio zod langchain @langchain/community @langchain/openai @langchain/core @langchain/textsplitters @langchain/langgraph @langchain/tavily\n",
     "```"
    ]
   },
@@ -206,11 +206,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
-    "import { TavilySearchResults } from \"@langchain/community/tools/tavily_search\";\n",
+    "import { TavilySearch } from \"@langchain/tavily\";\n",
     "import { Document } from \"@langchain/core/documents\";\n",
     "import { z } from \"zod\";\n",
     "import { ChatPromptTemplate } from \"@langchain/core/prompts\";\n",
@@ -378,8 +378,8 @@
     "): Promise<Partial<typeof GraphState.State>> {\n",
     "  console.log(\"---WEB SEARCH---\");\n",
     "\n",
-    "  const tool = new TavilySearchResults();\n",
-    "  const docs = await tool.invoke({ input: state.question });\n",
+    "  const tool = new TavilySearch();\n",
+    "  const docs = await tool.invoke({ query: state.question });\n",
     "  const webResults = new Document({ pageContent: docs });\n",
     "  const newDocuments = state.documents.concat(webResults);\n",
     "\n",