Fix v0.5.2.rst whatsnew text (#456)
Fix v0.5.2.rst whatsnew text (#456)

Restoring text that was deleted by mistake
rubennj/pvlib-python,alorenzo175/pvlib-python,pvlib/pvlib-python,anomam/pvlib-python,cwhanse/pvlib-python,mikofski/pvlib-python,wholmgren/pvlib-python