ci: do not delete cname

Author: demonkillerr

.github/workflows/deploy.yml

@@ -33,6 +33,8 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           # Build output to publish to the `gh-pages` branch:
           publish_dir: ./build
+          # Preserve CNAME for custom domain
+          cname: demonkiller.co.uk
           # The following lines assign commit authorship to the official
           # GH-Actions bot for deploys to `gh-pages` branch:
           # https://github.com/actions/checkout/issues/13#issuecomment-724415212