Add Setup Qemu Action

Author: donn

.github/workflows/ci.yml

@@ -32,6 +32,9 @@ jobs:
         with:
           fetch-depth: 0
           submodules: true
+      - if: ${{ matrix.os.runner == 'ubuntu-20.04' }}
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
       - uses: actions/setup-python@v3
       - name: Install cibuildwheel
         run: python -m pip install cibuildwheel==2.15.0