fix: Fix GCS URLs for sample data in tutorial_langgraph_rag_agent not…

…ebook (#1397)

# Description

This PR fixes the sample data path in GCS to one that is publicly
accessible.

- [X] Follow the [`CONTRIBUTING`
Guide](https://github.com/GoogleCloudPlatform/generative-ai/blob/main/CONTRIBUTING.md).
- [X] You are listed as the author in your notebook or README file.
- [X] Your account is listed in
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for the file(s).
- [X] Make your Pull Request title in the
<https://www.conventionalcommits.org/> specification.
- [X] Ensure the tests and linter pass (Run `nox -s format` from the
repository root to format).
- [X] Appropriate docs were updated (if necessary)

---------

Co-authored-by: Holt Skinner <[email protected]>

gemini/reasoning-engine/tutorial_langgraph_rag_agent.ipynb

@@ -407,7 +407,7 @@
         "\n",
         "    storage_client = storage.Client()\n",
         "    bucket = storage_client.bucket(bucket_name)\n",
-        "    blob = bucket.blob(blob_name)\n",
+        "    blob = bucket.blob(f\"{gcs_dir}/{blob_name}\")\n",
         "\n",
         "    if not blob.exists():\n",
         "        print(f\"File not found: gs://{bucket_name}/{gcs_dir}/{blob_name}\")\n",
@@ -453,7 +453,9 @@
         "    ),\n",
         ")\n",
         "docs = get_docs_from_gcs(\n",
-        "    \"reasoning-engine-test-1-bucket\", \"harry_potter\", \"harry_potter_movies.json\"\n",
+        "    \"github-repo\",\n",
+        "    \"generative-ai/gemini/reasoning-engine/sample_data\",\n",
+        "    \"harry_potter_movies.json\",\n",
         ")\n",
         "# Add data to the vector store\n",
         "ids = [str(uuid.uuid4()) for i in range(len(docs))]\n",
@@ -486,7 +488,9 @@
         "    ),\n",
         ")\n",
         "docs = get_docs_from_gcs(\n",
-        "    \"reasoning-engine-test-1-bucket\", \"harry_potter\", \"harry_potter_books.json\"\n",
+        "    \"github-repo\",\n",
+        "    \"generative-ai/gemini/reasoning-engine/sample_data\",\n",
+        "    \"harry_potter_books.json\",\n",
         ")\n",
         "# Add data to the vector store\n",
         "ids = [str(uuid.uuid4()) for i in range(len(docs))]\n",