Fix CodeQL failure (#1508)

.github/workflows/codeql.yml

@@ -20,19 +20,13 @@ jobs:
         with:
           languages: python, cpp
 
-      - name: Install Ninja
-        run: |
-              sudo apt-get update -y
-              sudo apt-get install -y ninja-build
-
       - name: Update submodules
         run: git submodule update --init --recursive
 
       - 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
-              sudo ln -s /usr/bin/ninja /usr/bin/ninja-build
+              python -m pip install cmake ninja
+              python -m pip install --pre torch -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
 
       - name: Build TorchAudio
         run: BUILD_SOX=1 USE_CUDA=0 python setup.py develop --user