typo fixup

Author: jbrockmendel

doc/source/whatsnew/v3.0.0.rst

@@ -331,10 +331,9 @@ small behavior differences as collateral:
 a :class:`offsets.Hour` object in cases where it used to return a :class:`Day` object.
 - Adding or subtracting a scalar from a timezone-aware :class:`DatetimeIndex`
 with a :class:`Day` ``freq`` no longer preserves that ``freq`` attribute.
-- Adding or subtracing a :class:`Day` with a :class:`Timedelta` is no longer supported.
+- Adding or subtracting a :class:`Day` with a :class:`Timedelta` is no longer supported.
 - Adding or subtracting a :class:`Day` offset to a :class:`Timestamp` or datetime-like may lead to an ambiguous or non-existent time, which will raise.
 
-
 .. _whatsnew_300.api_breaking.deps:
 
 Increased minimum version for Python