fix docs folder

.github/workflows/m2met2.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: ammaraskar/sphinx-action@master
         with:
-          docs-folder: "m2met2/"
+          docs-folder: "docs_m2met2/"
           pre-build-command: "pip install sphinx-markdown-tables nbsphinx jinja2 recommonmark sphinx_rtd_theme"
 
       - name: deploy copy