Update doc path in mkdocs.yml

Author: Didayolo

documentation/mkdocs.yml

@@ -163,6 +163,7 @@ nav:
           - Database size fix (version < 1.18.0): Developers_and_Administrators/Upgrading_Codabench/Database-size-fixes.md
   - Newsletters Archive:
       - 2024: Newsletters_Archive/CodaLab-in-2024.md
+      - 2025: Newsletters_Archive/CodaLab-in-2025.md
   - How you can contribue:
       - Contribute/index.md
       - Contribute/contributing.md