fix windows cuda script

tools/install_windows_cuda.ps1

@@ -10,15 +10,30 @@ $CUDA_KNOWN_URLS = @{
     "11.2" = "https://developer.download.nvidia.com/compute/cuda/11.2.2/network_installers/cuda_11.2.2_win10_network.exe";
     "11.3" = "https://developer.download.nvidia.com/compute/cuda/11.3.1/network_installers/cuda_11.3.1_win10_network.exe";
     "11.4" = "https://developer.download.nvidia.com/compute/cuda/11.4.2/network_installers/cuda_11.4.2_win10_network.exe";
-    "11.5" = "https://developer.download.nvidia.com/compute/cuda/11.5.0/network_installers/cuda_11.5.0_win10_network.exe";
-    "11.6" = "https://developer.download.nvidia.com/compute/cuda/11.6.2/network_installers/cuda_11.6.2_windows_network.exe"
+    "11.6" = "https://developer.download.nvidia.com/compute/cuda/11.6.2/network_installers/cuda_11.6.2_windows_network.exe";
     "11.7" = "https://developer.download.nvidia.com/compute/cuda/11.7.1/network_installers/cuda_11.7.1_windows_network.exe";
     "11.8" = "https://developer.download.nvidia.com/compute/cuda/11.8.0/network_installers/cuda_11.8.0_windows_network.exe";
+    "12.0" = "https://developer.download.nvidia.com/compute/cuda/12.0.0/network_installers/cuda_12.0.0_windows_network.exe";
 }
 
 # cuda_runtime.h is in nvcc <= 10.2, but cudart >= 11.0
 # @todo - make this easier to vary per CUDA version.
+# $CUDA_PACKAGES_IN = @(
+#     "nvcc";
+#     "visual_studio_integration";
+#     "curand_dev";
+#     "nvrtc_dev";
+#     "cudart";
+# )
+
+## -------------------
+## Select CUDA version
+## -------------------
+
+# Get the cuda version from the environment as env:cuda.
 $CUDA_VERSION_FULL = $env:cuda
+# Make sure CUDA_VERSION_FULL is set and valid, otherwise error.
+
 
 if (($CUDA_VERSION_FULL -eq "10.2") -or ($CUDA_VERSION_FULL -eq "11.0") -or ($CUDA_VERSION_FULL -eq "11.1") -or ($CUDA_VERSION_FULL -eq "11.2")){
     $CUDA_PACKAGES_IN = @(