Update nightly job to use 12.4 since 12.1 is deprecated

#1278 (comment)

Author: jerryzh168

.github/workflows/regression_test.yml

@@ -25,9 +25,9 @@ jobs:
         include:
           - name: CUDA Nightly
             runs-on: linux.g5.12xlarge.nvidia.gpu
-            torch-spec: '--pre torch --index-url https://download.pytorch.org/whl/nightly/cu121'
+            torch-spec: '--pre torch --index-url https://download.pytorch.org/whl/nightly/cu124'
             gpu-arch-type: "cuda"
-            gpu-arch-version: "12.1"
+            gpu-arch-version: "12.4"
           - name: CPU Nightly
             runs-on: linux.4xlarge
             torch-spec: '--pre torch --index-url https://download.pytorch.org/whl/nightly/cpu'