Add the deploy step for gh pages

.github/workflows/main.yml

@@ -162,3 +162,24 @@ jobs:
         source $CONDA/bin/activate
         [[ "$GITHUB_REF" =~ ^refs/tags/ ]] || export LABEL="--label dev"
         anaconda --verbose --token $ANACONDA_TOKEN upload --user ctools $LABEL conda-bld/*/*.tar.bz2 --force
+
+  deploy:
+    needs: upload
+
+    # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+    permissions:
+      pages: write      # to deploy to Pages
+      id-token: write   # to verify the deployment originates from an appropriate source
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    # Specify runner + deployment step
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4 # or specific "vX.X.X" version tag for this action
+