update whatsnew

Author: reepoi

docs/sphinx/source/whatsnew/v0.10.2.rst

@@ -21,6 +21,9 @@ Bug fixes
 ~~~~~~~~~
 * :py:func:`~pvlib.iotools.get_psm3` no longer incorrectly returns clear-sky
   DHI instead of clear-sky GHI when requesting ``ghi_clear``. (:pull:`1819`)
+* :py:func:`pvlib.singlediode.bishop88` with `method='newton'` no longer
+  crashes when passed `pandas.Series` of length one.
+  (:issue:`1787`, :pull:`1822`)
 
 Testing
 ~~~~~~~