Update copyright year

Author: LaurentRDC

_includes/footer.html

@@ -1,7 +1,7 @@
     <footer class="footer">
       <div class="container">
         <p class="pull-right" style="clear: right"><iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=haskell-distributed&repo=distributed-process&type=watch&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="100px" height="20px"></iframe></p>
-        <p>&copy; 2012 - 2024 <a href="http://twitter.com/welltyped">Well-Typed</a>
+        <p>&copy; 2012 - 2025 <a href="http://twitter.com/welltyped">Well-Typed</a>
             - <a href="http://twitter.com/CloudHaskell" target="_blank">CloudHaskell</a>
             - <a href="https://github.com/hyperthunk" target="_blank">Tim Watson</a>
             - <a href="https://github.com/haskell-distributed" target="_blank">Distributed Haskell maintainers</a>