Hotfix/gitact (#125)

* enable CI after PR sync

* Fixed github action

.github/workflows/build.yml

@@ -20,8 +20,8 @@ jobs:
           export https_proxy=http://172.17.0.1:7890 http_proxy=http://172.17.0.1:7890 all_proxy=socks5://172.17.0.1:7890
       - name: Install dependencies
         run: |
-          python3 -m pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
-          python3 -m pip install -U pip setuptools wheel --user
+          pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
+          pip install -U pip setuptools wheel --user
           pip install pytest tensorboard deepspeed apex
       - uses: actions/checkout@v2
       - name: Install Colossal-AI