fix: create pr need contents-write (#46579)

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES
## What kind of change does this PR introduce?

Bug fix - CI

## What is the current behavior?

action fails:
https://github.com/supabase/supabase/actions/runs/26818877603/job/79068294605

.github/workflows/update-js-libs.yml

@@ -94,6 +94,7 @@ jobs:
           app-id: ${{ secrets.GH_AUTOFIX_APP_ID }}
           private-key: ${{ secrets.GH_AUTOFIX_PRIVATE_KEY }}
           permission-pull-requests: write
+          permission-contents: write
 
       - name: Create pull request
         uses: peter-evans/create-pull-request@c5a7806660adbe173f04e3e038b0ccdcd758773c # v6.1.0