Update emscripten.yml

Author: mcbarton

.github/workflows/emscripten.yml

@@ -1009,7 +1009,7 @@ jobs:
           -DXEUS_CPP_RESOURCE_DIR=${{ env.LLVM_BUILD_DIR }}\lib\clang\${{ matrix.clang-runtime }} `
           -DSYSROOT_PATH=${{ env.SYSROOT_PATH }}                `
           ..
-        Error-OnFailure { node test_xeus_cpp.js }
+        Error-OnFailure { emmake make -j ${{ env.ncpus }} check-xeus-cpp }
         Error-OnFailure { emmake make -j ${{ env.ncpus }} install }
 
     - name: Test xeus-cpp Emscripten C++ tests in browsers on Windows Systems