Editora 0.9.10. Archived, so links from that release keep working. Read the 0.18.5 page →
GitHub: Review Pull Request Diff…
github.viewPrDiff Pick an open pull request and open its changed files in a review tab.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for GitHub: Review Pull Request Diff…, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.