reference is broken in docs of built-in functions

**Bug Description**

**Expected Behavior**

**Relation Case**

**Steps to Reproduce**

1.
2.
3.
4.

The issue shows a screenshot of broken references in built-in function documentation, but does not specify which files or functions are affected. Look for documentation files in the repository, likely in a docs/ directory, and search for markdown links or references to built-in functions. Check the rendered output to identify broken links, then correct the markdown syntax or file paths.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.