typo fixing of pvwatts_dc (#2175)

* typofixing of pvwatts_dc

* Update whatsnew

---------

Co-authored-by: Nicolau <[email protected]>

Author: BernatNicolau

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

@@ -69,4 +69,6 @@ Contributors
 * Mark A. Mikofski (:ghuser:`mikofski`)
 * Ben Pierce (:ghuser:`bgpierc`)
 * Jose Meza (:ghuser:`JoseMezaMendieta`)
+* Bernat Nicolau (:ghuser:`BernatNicolau`)
 * Eduardo Sarquis (:ghuser:`EduardoSarquis`)
+

pvlib/pvsystem.py

@@ -841,7 +841,7 @@ def scale_voltage_current_power(self, data):
     @_unwrap_single_value
     def pvwatts_dc(self, g_poa_effective, temp_cell):
         """
-        Calcuates DC power according to the PVWatts model using
+        Calculates DC power according to the PVWatts model using
         :py:func:`pvlib.pvsystem.pvwatts_dc`, `self.module_parameters['pdc0']`,
         and `self.module_parameters['gamma_pdc']`.