Use git switch instead of git checkout

Signed-off-by: Martin Tzvetanov Grigorov <mgrigorov@apache.org>

.github/workflows/deploy-docs.yml

@@ -268,7 +268,7 @@ jobs:
           touch .nojekyll
           git add --all
           git commit -m "Publish built website triggered by ${{ github.sha }}"
-          git checkout asf-site
+          git switch asf-site
           git reset --hard asf-site-staging
           git push origin asf-site --force