Add permissions to generate_cli_docs workflow

[iameskild]

Reference Issues or PRs

The API docs PR introduced a workflow to check for changes to the CLI, and if changes exist, that workflow will open a PR against the nebari-docs repo. This PR simply gives the workflow the required permissions to create this PR.

What does this implement/fix?

Put a x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

• Did you test the pull request locally?
• Did you add new tests?

Any other comments?

[iameskild]

@kcpevey we're seeing a new [AUTO] Update CLI docs PR for ever PR opened so I modified this workflow to only run when CLI related files are touched.

[kcpevey]

Thanks!