Fix comment typo in plot_simple_irradiance_adjustment (pvlib#2576)

Author: williamhobbs

docs/examples/shading/plot_simple_irradiance_adjustment_for_horizon_shading.py

@@ -14,7 +14,7 @@
 # After location information and a date range is established, solar position
 # data is calculated using :py:func:`pvlib.solarposition.get_solarposition`.
 # Horizon data is assigned, and interpolated to the solar azimuth time
-# series data. Finally, in times when solar elevation is greater than the
+# series data. Finally, in times when solar elevation is less than the
 # interpolated horizon elevation angle, DNI is set to 0.
 
 import numpy as np