To fix the issue, we will add a permissions block to the workflow. Since the workflow involves deploying an application using flyctl, it likely requires contents: read to access the repository's code and deployments: write to create deployments. These permissions will be explicitly defined at the job level to limit the scope of the GITHUB_TOKEN to only what is necessary.

To fix the issue, add a permissions block to the workflow file. Since the workflow does not appear to require write permissions, the minimal permissions of contents: read should be applied. This can be done at the root level of the workflow to apply to all jobs, or at the job level if different permissions are needed for each job. In this case, applying contents: read at the root level is sufficient and simplifies the configuration.