Update `cspell.json` to ignore the text "Niven"

Prerequisites

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Overview

We need to add the specified false positive term to the appropriate list in the Code Spell Checker configuration file cspell.json.

Action Items

[ ] You must use VS Code as your local text editor and install the Code Spell Checker extension. Code Spell Checker can be installed either using the VS Code text editor[^1] or the VS Code Marketplace website[^2].
[ ] Do not change any configuration settings or make any spell corrections.
[ ] Open the file cspell.json and locate the list named "undefined": [ ]
[ ] Add / insert the text "Niven", on the first line of the list:
```
  "Niven,"
```
[ ] Add to the front of the existing list- do not remove or replace any other list item.
[ ] Save cspell.json and then test the change by opening _data/external/_wins-data.json and confirming that no Code Spell Checker error/message related to "Niven" is displayed for this file.
[ ] Docker testing is not required. Create a Pull Request in the usual manner, with changes only to cspell.json.

Resources

[^1]: Installing Code Spell Checker from the VS Code text editor [^2]:Code Spell Checker - VS Marketplace

This issue was created as part of # 5312

Hi @t-will-gillis.

Please don't forget to add the proper labels to this issue. Currently, the labels for the following are missing:

Complexity, Role, Feature, Size

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After the proper labels are added, the merge team will review the issue and add a "Ready for Prioritization" label once it is ready for prioritization.

Additional Resources:

t-will-gillis / website