Add whatsnew

Author: tqa236

doc/source/whatsnew/v3.0.0.rst

@@ -285,6 +285,7 @@ Bug fixes
 - Fixed bug in :meth:`DataFrame.update` bool dtype being converted to object (:issue:`55509`)
 - Fixed bug in :meth:`Series.diff` allowing non-integer values for the ``periods`` argument. (:issue:`56607`)
 - Fixed bug in :meth:`Series.rank` that doesn't preserve missing values for nullable integers when ``na_option='keep'``. (:issue:`56976`)
+- Fixed bug in :class:`SparseDtype` for equal comparison with na fill value. (:issue:`54770`)
 
 Categorical
 ^^^^^^^^^^^