code is now supported in issue titles, pull request titles, and in any place issue and pull request titles are referenced in GitHub.
GitHub Light Default,
GitHub Dark Default and
GitHub Dark Dimmed themes matching the official github.com themes are now available in VS Code. To start using the new themes, go to the VS Marketplace, click on the "Install" button, and select one of the themes in VS Code. GitHub's classic VS Code themes
GitHub Light and
GitHub Dark are still available.