Try #6 for vcpkg w/github actions

Author: CJLove

.github/workflows/ci.yml

@@ -69,6 +69,8 @@ jobs:
           vcpkgGitCommitId: 120deac3062162151622ca4860575a33844ba10b
       - name: Build
         run: |
+          echo "CC=gcc-${{ matrix.config.version }}" >> $GITHUB_ENV
+          echo "CXX=g++-${{ matrix.config.version }}" >> $GITHUB_ENV
           mkdir -p build && cd build
           cmake .. \
             -DCMAKE_TOOLCHAIN_FILE=${{ runner.workspace }}/b/vcpkg/scripts/buildsystems/vcpkg.cmake \