message: ci: fix remote name in rebase instructions
  Previously, the rebase instructions were asking the user to rebase from
  `origin/master` instead of `upstream/master`.
  PR Close
diff: @@ -103,7 +103,7 @@ async function _main(repository, prNumber) {
  git fetch upstream ${target.baseRef};
  git checkout ${target.headRef};
  - git rebase origin/${target.baseRef};
  + git rebase upstream/${target.baseRef};
  git push --force-with-lease;
  `);
  } else {
  