CitationFootnote Comma Error

Observed error of citations without URL's ending with a comma. Citation.js and/or CitationFootnote.js correction required.

<img width="867" height="37" alt="Image" src="https://github.com/user-attachments/assets/8c94263e-5a33-48bc-b0de-fc78431514ff" />

<img width="474" height="153" alt="Image" src="https://github.com/user-attachments/assets/40cf7373-2693-408a-9e12-2e8ceb4fb343" />