setup.py: Bump to 2024.12.

Author: enjoy-digital

setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name                          = "litex-boards",
-    version                       = "2024.08",
+    version                       = "2024.12",
     description                   = "LiteX supported boards",
     long_description              = long_description,
     long_description_content_type = "text/markdown",