Update whatsnew doc.

Author: ramaroesilva

docs/sphinx/source/whatsnew/v0.13.2.rst

@@ -46,8 +46,8 @@ Enhancements
   MERRA-2 reanalysis data. (:pull:`2572`)
 * Add :py:func:`~pvlib.spectrum.spectral_factor_polo`, a function for estimating
   spectral mismatch factors for vertical PV façades. (:issue:`2406`, :pull:`2491`)
-* Includes `ross` and `faiman_rad` in the allowed models within 
-  `pvlib.pvsystem.PVSystem.get_cell_temperature` (:issue:`2625`, :pull:`2631`)
+* Include `ross` and `faiman_rad` in the allowed models within 
+  :py:meth:`pvlib.pvsystem.PVSystem.get_cell_temperature` (:issue:`2625`, :pull:`2631`)
 
 Documentation
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