ci: fix insecure git protocol (#2177)

Author: mtrezza

.github/workflows/ci.yml

@@ -129,6 +129,8 @@ jobs:
         run: |
           node_major=$(echo "${{ matrix.NODE_VERSION }}" | cut -d'.' -f1)
           echo "::set-output name=node_major::$(echo $node_major)"
+      - name: Fix usage of insecure GitHub protocol
+        run: sudo git config --system url."https://github".insteadOf "git://github"
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.NODE_VERSION }}
         uses: actions/setup-node@v1