Update pvlib/iotools/pvgis.py

Co-authored-by: Kevin Anderson <kevin.anderso@gmail.com>

Author: AdamRJensen

pvlib/iotools/pvgis.py

@@ -479,7 +479,7 @@ def get_pvgis_tmy(latitude, longitude, outputformat='json', usehorizon=True,
         1st. Ignored if ``None``, otherwise will force year to ``coerce_year``.
     coerce_year: int, default 1990
         Use to force indices to desired year. Defaults to 1990. Specify
-        ``None`` to return the actual indicies used for the TMY. If
+        ``None`` to return the actual indices used for the TMY. If
         ``coerce_year`` is ``None``, but ``roll_utc_offset`` is specified,
         then ``coerce_year`` will be set to the default.