Align default arch of CTK 12.9 with CTK 13.0. (#12204)

Author: trivialfis

cmake/Utils.cmake

@@ -74,6 +74,8 @@ function(compute_cmake_cuda_archs archs)
   if(NOT CMAKE_CUDA_ARCHITECTURES)
     if(CUDA_VERSION VERSION_GREATER_EQUAL "13.0")
       set(CMAKE_CUDA_ARCHITECTURES 75 80 90 100 120)
+    elseif(CUDA_VERSION VERSION_GREATER_EQUAL "12.9")
+      set(CMAKE_CUDA_ARCHITECTURES 75 80 90 100 120)
     elseif(CUDA_VERSION VERSION_GREATER_EQUAL "12.8")
       set(CMAKE_CUDA_ARCHITECTURES 50 60 70 80 90 100 120)
     elseif(CUDA_VERSION VERSION_GREATER_EQUAL "11.8")