Use features repo main

Author: dandavison

.github/workflows/ci.yml

@@ -119,4 +119,3 @@ jobs:
       python-repo-path: ${{github.event.pull_request.head.repo.full_name}}
       version: ${{github.event.pull_request.head.ref}}
       version-is-repo-ref: true
-      features-repo-ref: python-update-updates