Update emscripten.yml

Author: mcbarton

.github/workflows/emscripten.yml

@@ -993,7 +993,7 @@ jobs:
       if: ${{ runner.os == 'windows' }}
       shell: powershell
       run: |
-          cd ./xeus-cpp/
+          cd .\xeus-cpp\
           micromamba create -n xeus-lite-host jupyterlite-core=0.6 jupyterlite-xeus jupyter_server jupyterlab notebook python-libarchive-c -c conda-forge
           micromamba activate xeus-lite-host
           jupyter lite build --XeusAddon.prefix=${{ env.PREFIX }} --contents notebooks/xeus-cpp-lite-demo.ipynb --contents notebooks/smallpt.ipynb --contents notebooks/images/marie.png --contents notebooks/audio/audio.wav --output-dir dist