gh-89253: Add 3.10 whatsnew section for itertools.pairwise (GH-91563)



#89253

[`pairwise()`](https://docs.python.org/3/library/itertools.html#itertools.pairwise) already has the 'new in python3.10'

Automerge-Triggered-By: GH:rhettinger
1 file changed