docs(python): Add docstring example for DataFrame.limit

[montanarograziano]

Related to: Add missing docstring examples #13161

Add example for:
https://docs.pola.rs/py-polars/html/reference/dataframe/api/polars.DataFrame.limit.html

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.37%. Comparing base (5d0e339) to head (79b6e1c).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16753      +/-   ##
==========================================
- Coverage   81.45%   81.37%   -0.08%     
==========================================
  Files        1413     1415       +2     
  Lines      186053   186167     +114     
  Branches     2756     2720      -36     
==========================================
- Hits       151547   151496      -51     
- Misses      34003    34177     +174     
+ Partials      503      494       -9     

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[stinodego]

Thanks - some minor comments on the formatting and this can be merged.

[montanarograziano]

Thank you! I've applied the changes you mentioned.

[stinodego]

Great, thanks!