Add reference to pull request in whatsnew file

Author: cmjcharlton

doc/source/whatsnew/v3.0.0.rst

@@ -49,7 +49,7 @@ Other enhancements
 - :meth:`Series.cummin` and :meth:`Series.cummax` now supports :class:`CategoricalDtype` (:issue:`52335`)
 - :meth:`Series.plot` now correctly handle the ``ylabel`` parameter for pie charts, allowing for explicit control over the y-axis label (:issue:`58239`)
 - Restore support for reading Stata 104-format and enable reading 103-format dta files (:issue:`58554`)
-- Support reading Stata 102-format (Stata 1) dta files
+- Support reading Stata 102-format (Stata 1) dta files (PR 58978)
 - Support reading Stata 110-format (Stata 7) dta files (:issue:`47176`)
 
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