fix path

Author: kp992

.github/workflows/myst_ci.yml

@@ -55,5 +55,5 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./lectures/_build/html
+          publish_dir: lectures/_build/html
           #  publish_branch: myst-build-test