Fix set site settings in swagger_ui so it function correctly.

[ianwallen]

Prior to this fix, the swagger ui for applying site settings was not working.

Before the swagger ui would look like the following

And generate the following error

After, it will look like the following (with some examples.)

And when valid values are supplied, it will generate the following results

Checklist

• I have read the contribution guidelines
• Pull request provided for main branch, backports managed with label
• Good housekeeping of code, cleaning up comments, tests, and documentation
• Clean commit history broken into understandable chucks, avoiding big commits with hundreds of files, cautious of reformatting and whitespace changes
• Clean commit messages, longer verbose messages are encouraged
• API Changes are identified in commit messages
• Testing provided for features or enhancements using automatic tests
• User documentation provided for new features or enhancements in manual
• Build documentation provided for development instructions in README.md files
• Library management using pom.xml dependency management. Update build documentation with intended library use and library tutorials or documentation