add TODO to automate default branch change in GitHub

README.md

@@ -49,6 +49,7 @@ After the codename is announced and `base-files` is uploaded:
  1. Update the default branch for rSEED both on Phabricator and upstream in Launchpad.
  1. Make sure `repo-list` is up-to-date and run `setup-phab` in this repo. The production values can be found in the internal setup document.
  1. Someone with access to GitHub should update the default branches for the mirrored repositories.
+    * TODO: automate me
  1. Update the CI to enable builds for the new release:
     1. In [ci.conf](https://phab.lubuntu.me/source/ci-metadata/browse/master/ci.conf):
        1. Add the new codename to the `releases` list, and remove old releases if necessary.