Remove the blank line between docstring and function head

How would I change yapf config to remove the blank line between docstring and function head?
My yapf config
```
[tool.yapf]
based_on_style = "pep8"
column_limit = 120
split_before_named_assigns = false
blank_line_before_nested_class_or_def = false
```

Expect
```
"""
some comments
@param xxx
@return xxx
"""
>>>> remove this blank line
def func(xxx):
xxxx
```

After pre-commit checking, it always keeps the blank line.