¿? Add warning into oedi example just in case

Author: echedey-ls

docs/examples/system-models/NX_oedi_9068.py

@@ -16,6 +16,12 @@
 # 9068 <https://data.openei.org/s3_viewer?bucket=oedi-data-lake&prefix=pvdaq%2F2023-solar-data-prize%2F9068_OEDI%2F>`__.
 # For more information about the system, see its `OEDI
 # page <https://openei.org/wiki/PVDAQ/Sites/SR_CO>`__.
+#
+# .. warning::
+#    This example requires user-provided credentials to be run at step
+#    :ref:`Fetch weather data <fetch_weather_data>`. Therefore, it is not executed as part of
+#    documentation build process and it's more susceptible to API changes.
+#    Please, report any issues you may find.
 
 # sphinx_gallery_thumbnail_path = "_images/OEDI_9068_daily_timeseries.png"
 import pvlib
@@ -132,6 +138,7 @@
 # %%
 # Fetch weather data
 # ------------------
+# .. _fetch_weather_data:
 #
 # The system does have measured plane-of-array irradiance data, but the
 # measurements suffer from row-to-row shading and tracker stalls. In this