fix: checkout to gh-pages branch

Author: toothlessdev

.github/workflows/deploy.yml

@@ -31,4 +31,5 @@ jobs:
                   git remote set-url origin https://x-access-token:${GITHUB_TOKEN}@github.com/toothlessdev/toothlessdev.github.io.git
                   git add .
                   git commit -m "Deploy to GitHub Pages"
+                  git checkout gh-pages
                   git push origin gh-pages