Fix colab link(missing graph in url) and comment to match the code fo… (#10344)

- Description: Fixing Colab broken link and comment correction to align
with the code that uses Warren Buffet for wiki query
  - Issue: None open
  - Dependencies: none
  - Tag maintainer: n/a
  - Twitter handle: Not a PR change but: kcocco

docs/extras/use_cases/more/graph/diffbot_graphtransformer.ipynb

@@ -7,7 +7,7 @@
    "source": [
     "# Diffbot Graph Transformer\n",
     "\n",
-    "[![Open In Collab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/extras/use_cases/more/graph/diffbot_transformer.ipynb)\n",
+    "[![Open In Collab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/langchain-ai/langchain/blob/master/docs/extras/use_cases/more/graph/diffbot_graphtransformer.ipynb)\n",
     "\n",
     "## Use case\n",
     "\n",
@@ -77,7 +77,7 @@
    "id": "5e3b894a-e3ee-46c7-8116-f8377f8f0159",
    "metadata": {},
    "source": [
-    "This code fetches Wikipedia articles about \"Baldur's Gate 3\" and then uses `DiffbotGraphTransformer` to extract entities and relationships.\n",
+    "This code fetches Wikipedia articles about \"Warren Buffett\" and then uses `DiffbotGraphTransformer` to extract entities and relationships.\n",
     "The `DiffbotGraphTransformer` outputs a structured data `GraphDocument`, which can be used to populate a graph database.\n",
     "Note that text chunking is avoided due to Diffbot's [character limit per API request](https://docs.diffbot.com/reference/introduction-to-natural-language-api)."
    ]