[`gh`] PR creation returns an error

[juanjosevazquezgil]

Motivation

When using this module within our other modules PRs are created, but an error is returned: https://github.com/jvazquez-prefapp/claims/actions/runs/22390513879/job/64811035794#step:4:1570

This probably happens because we are executing gh commands one after the other within our code without giving GitHub any time to process them. To fix this we can either add some sort of sleep() call or some new retry logic (this would be the preferred approach IMO)

Acceptance criteria

• No error happens when creating a PR unless an error has actually happened and the PR could not be created