[BUG]: SearchIssues with SearchIssuesRequest.Assignee="none" throws ApiValidationException

[suchja]

What happened?

The following code produces a ApiValidationException:

var github = new GitHubClient(new ProductHeaderValue("myApp"));

SearchIssuesRequest? issuesRequest = new SearchIssuesRequest();
issuesRequest.Assignee = "none";

var issuesResult = await github.Search.SearchIssues(issuesRequest);

Current outcome: ApiValidationException
Expected outcome: All issues that are unassigned

Although the documentation for searching issues does not explicitly state, that it is possible to search for unassigned issues, filtering issues states that it is possible. So I would expect that this is a valid search scenario. Searching on the GitHub website does allow no:assignee.

I haven't tried so far whether filtering is possible for unassigned issues, but I'll try to check that as soon as possible.

Versions

Octokit.net 9.0.0

Relevant log output

No response

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