Dead link to Svalbard Treaty on Archive Program Website

There is a dead link on the [Archive Vault](https://archiveprogram.github.com/arctic-vault/) page of the Archive Program website.

The current link points to: https://www.loc.gov/law/help/us-treaties/bevans/m-ust000002-0269.pdf

I don't know what the correct link should be, but I located the treaty in the Library of Congress in [Treaties and Other International Agreements of the United States of America: Volume 2 (Multilateral treaties, 1918-1930)](https://www.loc.gov/item/lltreaties-ustbv002/)

Working link to the treaty page: https://tile.loc.gov/storage-services/service/ll/lltreaties//lltreaties-ustbv002/lltreaties-ustbv002.pdf#page=277

Please advise if there is a better place to post this.

Abre la página Archive Vault e inspecciona el enlace de Svalbard Treaty, que actualmente apunta al PDF no disponible de loc.gov. Compáralo con el enlace funcional al PDF del tratado de Library of Congress proporcionado en el issue. La tarea estará terminada cuando la página enlace al tratado funcional y el enlace se abra correctamente.

Escrito por el modelo de indexación a partir del texto del issue.