fix gcc?

Author: sdkrystian

.github/workflows/ci.yml

@@ -77,6 +77,7 @@ jobs:
           cxxstd: ${{ matrix.std }}
           cxx: ${{ steps.setup-cpp.outputs.cxx }}
           cc: ${{ steps.setup-cpp.outputs.cc }}
+          cxxflags: ${{ ( matrix.compiler == 'gcc' && '-static-libstdc++') || '' }}
           toolchain: ${{ steps.package-install.outputs.vcpkg-toolchain }}
           generator: Ninja
           install-prefix: .local