DOC: Search function in website (https://python.langchain.com/) can not work now, throw Page Not Found(404)

[huan11]

Checklist

• I added a very descriptive title to this issue.
• I included a link to the documentation page I am referring to (if applicable).

Issue with current documentation:

No response

Idea or request for content:

How to repeat the issue:

Step 1 Search:

Step2 Throw 404 issue