ci: Update gh-pages script (#117)

* ci: deal with switcher changes

.github/workflows/gh-pages.yml

@@ -72,17 +72,19 @@ jobs:
           for TAG in `git tag --list --sort=-version:refname`
           do
             python -m pip uninstall -y sansmic
-            rm -rf docs/_build/doxyxml docs/apidocs/*
+            rm -rf docs/_build/doxyxml docs/apidocs/* docs/_static/switcher.json
             export SANSMIC_SPHINX_VERSION=$TAG
             export VERSION_INFO=$TAG
             mkdir docs/_build/doxyxml
             git checkout $TAG
+            python build_docs.py
             python -m pip install --no-deps -e .
             sphinx-build -b html docs/ out/releases/$TAG
           done
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1
+        if: always()
         with:
           path: 'out/'