fix: add newline

Author: jeffabailey

.github/workflows/mdbook_deploy.yml

@@ -60,4 +60,4 @@ jobs:
           publish_dir: ./book
           publish_branch: gh-pages
           user_name: 'github-actions[bot]'
-          user_email: '41898282+github-actions[bot]@users.noreply.github.com'
+          user_email: '41898282+github-actions[bot]@users.noreply.github.com'