Downgrade CUDA CI

Author: zfergus

.github/workflows/continuous.yml

@@ -134,7 +134,7 @@ jobs:
       - uses: Jimver/cuda-toolkit@v0.2.17
         id: cuda-toolkit
         with:
-          cuda: '12.5.0'
+          cuda: '12.4.0'
           sub-packages: '["nvcc"]'
           method: 'network'