Update codeql.yml (#3764)

.github/workflows/codeql.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Install Torch
         run: |
               python -m pip install cmake
-              python -m pip install torch==1.8.1+cpu -f https://download.pytorch.org/whl/torch_stable.html
+              python -m pip install --pre torch -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
               sudo ln -s /usr/bin/ninja /usr/bin/ninja-build
 
       - name: Build TorchVision