chore(go-sdk): fix up MaxParallelRequests docs

[jimmyjames]

Description

Add back MaxParallelRequests documentation for List Users

References

From https://github.com/openfga/go-sdk/commit/e6b8cb2c7674bfff69735a1baf860aea1941b26c

Review Checklist

• [x] I have clicked on "allow edits by maintainers".
• [ ] I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• [x] The correct base branch is being used, if not main
• [ ] I have added tests to validate that the change in functionality is working as expected