Make some updates to SearchApi documentation

Author: raju249

docs/tutorial/web_search.md

@@ -190,8 +190,7 @@ This is enabled on a per session basis eg. reloading the page, changing to anoth
 3. With `API key`, open `Open WebUI Admin panel` and click `Settings` tab, and then click `Web Search`.
 4. Enable `Web search` and set `Web Search Engine` to `searchapi`.
 5. Fill `SearchApi API Key` with the `API key` that you copied in step 2 from [SearchApi](https://www.searchapi.io/) dashboard.
-6. Enter `SearchApi engine` name that you want to query. Example, `google`, `bing`, `baidu`, `google_news`, `bing_news`, `google_videos`, `google_scholar` and `google_patents`. This is optional as the API defaults to `google`.
-Any existing or upcoming SERP engines added by [SearchApi](https://www.searchapi.io/) that returns `organic_results` is supported. If not given, the search uses `google` engine as default.
+6. [Optional] Enter the `SearchApi engine` name you want to query. Example, `google`, `bing`, `baidu`, `google_news`, `bing_news`, `google_videos`, `google_scholar` and `google_patents.` By default, it is set to `google`.
 7. Click `Save`.
 
 ![Open WebUI Admin panel](../../static/img/tutorial_searchapi_search.png)