Update FormosanBank AI addendum link

Updates dataset card links from the merged PR branch to the canonical main-branch AI Use Addendum.

README.md

@@ -41,6 +41,6 @@ Dataset card for FormosanBank/Whitehorn_Collection.
 This dataset is part of FormosanBank and is subject to corpus-specific source restrictions plus the central FormosanBank terms:
 
 - Terms of Use: https://ai4commsci.gitbook.io/formosanbank/additional-resources/terms-of-use
-- AI Use Addendum: https://github.com/FormosanBank/FormosanBank/blob/codex/ai-license-notices/AI-USE-ADDENDUM.md
+- AI Use Addendum: https://github.com/FormosanBank/FormosanBank/blob/main/AI-USE-ADDENDUM.md
 
 Commercial AI Use is prohibited without prior written permission. Use the access-request fields above for noncommercial research, education, cultural, and language revitalization uses.