Merge pull request #8 from jupyter-book/agoose77/fix-further-ci

🐝 Fix CI to use `npx`

Author: agoose77

.github/workflows/deploy.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Install MyST Markdown
         run: npm install
       - name: Build HTML Assets
-        run: myst build --html
+        run: npx myst build --html
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with: