Update LICENSE copyright date in manual.

Author: rdzman

docs/MOST-manual.pdf

@@ -23,7 +23,7 @@ Pre-release
   - `docs/relnotes/MOST-Release-Notes-#.#.md`
   - `docs/src/MOST-manual/MOST-manual.tex`
     - title page
-    - copyright
+    - copyright (front page and LICENSE text)
     - Appendix B Release History
     - `\mostver`  (update `\mpver`, `\mptestver`, `\mipsver`, `\mpomver` too)
   - Sphinx docs
@@ -82,7 +82,7 @@ Pre-release
 - Commit all changes to `prep-for-release`.
 - Push `prep-for-release` to GitHub.
 - Make sure CI checks are ok.
-- Make copy named `MOST-manual-x.x.pdf`
+- Make copy of `docs/MOST-manual.pdf` named `MOST-manual-x.x.pdf`
   - copy to `docs` directory of `matpower.org-static` git repo
     - update `MOST-manual.pdf` symlink on `https://matpower.org/docs/` to point
       to new `MOST-manual-x.x.pdf` (replaces existing current version)

docs/other/MOST-Release-Checklist.md

@@ -279,7 +279,7 @@ \subsection{License and Terms of Use}
 The code in \most{} is distributed along with \matpower{} under the 3-clause BSD license~\cite{bsd}. The full text of the license can be found in the \code{LICENSE} file at the top level of the distribution or at \url{https://matpower.org/license/} and reads as follows.
 
 \begin{Notice}
-Copyright (c) 1996-2016, Power Systems Engineering Research Center
+Copyright (c) 1996-2024, Power Systems Engineering Research Center
 (PSERC) and individual contributors (see AUTHORS file for details).
 All rights reserved.