update whats new for pvlib#844 and other contributors

Author: wholmgren

docs/sphinx/source/whatsnew/v0.7.1.rst

@@ -15,9 +15,10 @@ Enhancements
 * Added `leap_day` parameter to `iotools.get_psm3` instead of hardcoding it as
   False.
 
-
 Bug fixes
 ~~~~~~~~~
+* Fix error in logic for emitting deprecation warning in
+  :py:func:`~pvlib.pvsystem.sapm` (:pull:`844`)
 * Changed the PSM3 API endpoint for TMY requests in `iotools.get_psm3`.
 
 Testing
@@ -33,3 +34,7 @@ Documentation
 Contributors
 ~~~~~~~~~~~~
 * Kevin Anderson (:ghuser:`kanderso-nrel`)
+* :ghuser:`dzimmanck`
+* Will Holmgren (:ghuser:`wholmgren`)
+* Mark Mikofski (:ghuser:`mikofski`)
+* Cliff Hansen (:ghuser:`cwhanse`)