Prevent NSAttributedString from crashing when an application attempts to handle content that includes a URL that might be handled by an AppSSO plugin.:wq
Pull request: https://github.com/WebKit/WebKit/pull/862
<rdar://93656000>
Committed r294831 (250981@main): <https://commits.webkit.org/250981@main> Reviewed commits have been landed. Closing PR #862 and removing active labels.