Update pr.yml

change to use pypi.org for cu12

Signed-off-by: Ming M Qin <38891913+MMelQin@users.noreply.github.com>

Author: MMelQin

.github/workflows/pr.yml

@@ -23,7 +23,7 @@ jobs:
           pip install virtualenv
           virtualenv .venv
           source .venv/bin/activate
-          python3 -m pip install nvidia-cuda-runtime-cu12 --index https://pypi.ngc.nvidia.com
+          python3 -m pip install nvidia-cuda-runtime-cu12
           ./run setup
       - name: Check formatting
         run: |