Fix minor issue in OEDI 9068 example gallery page

[kandersolar]

• [ ] Closes #xxxx
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• [ ] Tests added
• [ ] Updates entries in docs/sphinx/source/reference for API changes.
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• [ ] New code is fully documented. Includes numpydoc compliant docstrings, examples, and comments where necessary.
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This PR corrects a problem where latitude and longitude are being passed to location.get_solarposition's temperature and pressure parameters:

pvlib-python/docs/examples/system-models/plot_oedi_9068.py

Line 168 in 389e3d1

solar_position = location.get_solarposition(psm3.index, latitude, longitude)