docs: fix duplicate 'on' in web search example prompt

Author: chenlichao

examples/third_party/Web_search_with_google_api_bring_your_own_browser_tool.ipynb

@@ -579,7 +579,7 @@
     "import json \n",
     "\n",
     "final_prompt = (\n",
-    "    f\"The user will provide a dictionary of search results in JSON format for search query {search_term} Based on on the search results provided by the user, provide a detailed response to this query: **'{search_query}'**. Make sure to cite all the sources at the end of your answer.\"\n",
+    "    f\"The user will provide a dictionary of search results in JSON format for search query {search_term} Based on the search results provided by the user, provide a detailed response to this query: **'{search_query}'**. Make sure to cite all the sources at the end of your answer.\"\n",
     ")\n",
     "\n",
     "response = client.chat.completions.create(\n",