fix typo on calcparams_desoto help (#2174)

* fix_typo_calcparams_desoto

There's a typo in the documentation of the "saturation_current" parameter on line 1553.

* Update v0.11.1.rst

Author: EduardoSarquis

docs/sphinx/source/whatsnew/v0.11.1.rst

@@ -69,3 +69,4 @@ Contributors
 * Mark A. Mikofski (:ghuser:`mikofski`)
 * Ben Pierce (:ghuser:`bgpierc`)
 * Jose Meza (:ghuser:`JoseMezaMendieta`)
+* Eduardo Sarquis (:ghuser:`EduardoSarquis`)

pvlib/pvsystem.py

@@ -1550,7 +1550,7 @@ def calcparams_desoto(effective_irradiance, temp_cell,
         Light-generated current in amperes
 
     saturation_current : numeric
-        Diode saturation curent in amperes
+        Diode saturation current in amperes
 
     resistance_series : numeric
         Series resistance in ohms