jax

ea7683f0 - Add GHA workflow for opening PRs upstream (#116)

Add GHA workflow for opening PRs upstream (#116) * Add file for opening PRs upstream * Add HEAD_REF as environment variable * Fill out code for making a new branch and opening a PR to upstream * Add names for steps * Fix yaml * Fix yaml again * Leave a comment on the old PR linking to the new one * Add proper permissions for creating banches and opening PRs * Fix YAML