Update pvlib/bifacial/ants2d.py

Co-authored-by: Adam R. Jensen <39184289+AdamRJensen@users.noreply.github.com>

Author: kandersolar

pvlib/bifacial/ants2d.py

@@ -442,10 +442,11 @@ def get_irradiance(tracker_rotation, axis_azimuth, solar_zenith, solar_azimuth,
           rows. [unitless]
 
     ground_irradiance : dict or DataFrame
+        Only returned when ``return_ground_components=True``.
         ``ground_irradiance`` is a DataFrame when inputs are Series
         and ``n_ground_segments=1``, a dict of scalars when inputs are scalars
         and ``n_ground_segments=1``, and a dict of ``np.ndarray``
-        otherwise.  Only returned when ``return_ground_components=True``.
+        otherwise. 
         The following quantities are included:
 
         - ``ground_direct``: direct irradiance incident on the ground surface.