doc: update dsintro.rst to remove a warring
To solve a warning in issue DOC: DeprecationWarning on "Intro to data structures" user guide #60490. 
I have checked other parts of the page, and there are no such warnings.

issue url:  [https://github.com/pandas-dev/pandas/issues/60490](url)

closes #60490
Thanks @asdkfjsd 