gh-pages fix: bypass jekyll, allow files with underscore

Author: metachris

.github/workflows/deploy-gh-pages.yml

@@ -18,6 +18,7 @@ jobs:
         node-version: '10'
     - run: yarn install --frozen-lockfile
     - run: yarn doc
+    - run: touch docs/.nojekyll
     - name: Deploy docs 🚀
       uses: JamesIves/github-pages-deploy-action@releases/v3
       with: