Fix changeset automation PR

[arboleya]

The changesets PR is created correctly, using the fuels-service-user via the REPO_TOKEN :

fuels-ts/.github/workflows/release.yaml

Line 60 in 53babd5

GITHUB_TOKEN: ${{ secrets.REPO_TOKEN }}

Then, all subsequent updates to it seem to come from the GH bot, and the workflows stop running automatically.

• These updates happen when other PRs are merged into master
• Only the fuels-service-user can trigger CI automatically
• GH bot can't trigger CI

At this point, someone must go and close/open the PR and rename its title to something else and back.

This is a follow-up issue on top of:

• Automatically trigger CI workflow changeset PRs #465

[arboleya]

Screenshot of how it looks: