Merge pull request #899 from stan-dev/update-logo-link

Update link to logo usage guidelines, copyright year

Author: avehtari

src/copyright_licensing.qmd

@@ -1,6 +1,6 @@
 #### Copyright and trademark {-}
 
-* Copyright 2011--2024, Stan Development Team and their assignees.
+* Copyright 2011--2025, Stan Development Team and their assignees.
 
 * The Stan name and logo are registered trademarks of NumFOCUS.
 
@@ -11,4 +11,4 @@
 
 * *Computer code:*  [BSD 3-clause license](https://opensource.org/licenses/BSD-3-Clause)
 
-* *Logo:*  [Stan logo usage guidelines](https://mc-stan.org/about/logo/)
+* *Logo:*  [Stan logo usage guidelines](https://mc-stan.org/about/#copyright-and-trademark)