Fix outline indices not being updated for GeographicMesh when positio…

[ghost]

Description of the Change

Fixes a typo in GeographicMesh that causes outlines to break when positions are updated.

Why Should This Be In Core?

It fixes a bug in a core shape.

Benefits

It fixes a bug.

Potential Drawbacks

None.

Applicable Issues

Outlines break when positions are updated on a GeographicMesh.

[pdavidc]

@sashavolv2 Thank you for the precise and thoughtful contribution. At the moment, we're unable to accept external pull requests, and we're working to resolve that. We'll leave this pull request open and will address it soon.