Mod Messages: update cs50x version to 2024 (#99)

conf.py

@@ -58,7 +58,7 @@
         "If you are completely new to the topic, exercism might be very challenging. "
         "There are many great resources online, that can kickstart your journey in "
         "computer science. For a wide understanding, you can try the free CS50x course "
-        "at Harvard: http://cs50.harvard.edu/x/2023/. If you want to focus on web development "
+        "at Harvard: http://cs50.harvard.edu/x/2024/. If you want to focus on web development "
         "you can also try The Odin Projects (free and open source: http://theodinproject.com). "
         "It is a long-term commitment, that will guide you to master some projects and will prepare you to "
         "show off a nice portfolio in the end. Another interesting "