CI: Update permissions

[nourinmohd]

Resolves #259

Updated the permissions for the ci-fmudatamodels.yml.

Checklist

• Tests added (if not, comment why)
• Test coverage equal or up from main (run pytest with --cov=src/ --cov-report term-missing)
• If not squash merging, every commit passes tests
• Appropriate commit prefix and precise commit message used
• All debug prints and unnecessary comments removed
• Docstrings are correct and updated
• Documentation is updated, if necessary
• Latest main rebased/merged into branch
• Added comments on this PR where appropriate to help reviewers
• Moved issue status on project board
• Checked the boxes in this checklist ✅

[GibranAlfa]

this won't work. workflow is not a valid github_token permission syntax (https://docs.github.com/en/actions/reference/workflows-and-actions/workflow-syntax#permissions). the special case for this release is that we have a commit that change a file in .github folder (the pinning actions to hash), and github token doesn't have permission to do that. because this is rare, it's better to just do the schema release manually this time, and don't change any permission. regular schema release will work if it doesn't contain any commit that modify .github folder.