3f08a033d9
Autofix action is failing with error message:
```
fatal: You are not currently on a branch.
To push the history leading to the current (detached HEAD)
state now, use
git push origin HEAD:<name-of-remote-branch>
```
This is because the checkout action on a PR by default checks out the merge commit, which is not a branch. Instead, check out [`github.head_ref`](https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/accessing-contextual-information-about-workflow-runs#github-context), which will point to the source of the PR.
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Co-authored-by: github-tidy-bot <github-tidy-bot@supabase.com>