Typo

[ocefpaf]

Fixed a minor typo and re-run the cells in order to ensure the notebook run linearly.

[review-notebook-app]

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[ocefpaf]

The failures are:

=========================== short test summary info ============================
FAILED jupyterbook/content/code_gallery/data_access_notebooks/2019-03-08-grids-temperature.ipynb::Cell 5
FAILED jupyterbook/content/code_gallery/data_analysis_and_visualization_notebooks/2016-11-16-CF-UGRID-SGRID-conventions.ipynb::Cell 12
FAILED jupyterbook/content/code_gallery/data_analysis_and_visualization_notebooks/2016-11-16-CF-UGRID-SGRID-conventions.ipynb::Cell 23
FAILED jupyterbook/content/code_gallery/data_analysis_and_visualization_notebooks/2018-12-04-grids.ipynb::Cell 4

They all seems to be related to data upstream. Let's give it some time before we mark these as stable, maybe the servers are down.