Update to rapids-cmake 23.12. (#385)

This updates cuCollections to rapids-cmake 23.12. This comes with
rapidsai/rapids-cmake#464, which updates
libcudacxx to 2.1.0. That should unblock several cuCollections issues
such as #332,
#331,
#289.

CMakeLists.txt

@@ -16,7 +16,7 @@
 cmake_minimum_required(VERSION 3.23.1 FATAL_ERROR)
 
 if(NOT EXISTS ${CMAKE_CURRENT_BINARY_DIR}/CUCO_RAPIDS.cmake)
-    file(DOWNLOAD https://raw.githubusercontent.com/rapidsai/rapids-cmake/branch-23.10/RAPIDS.cmake
+    file(DOWNLOAD https://raw.githubusercontent.com/rapidsai/rapids-cmake/branch-23.12/RAPIDS.cmake
          ${CMAKE_CURRENT_BINARY_DIR}/CUCO_RAPIDS.cmake)
 endif()
 include(${CMAKE_CURRENT_BINARY_DIR}/CUCO_RAPIDS.cmake)