fix(python): Convert tabs to spaces

[booniepepper]

Description

Converting a few stray tabs to spaces to address failures in Python SDK unit tests.

References

• https://github.com/openfga/sdk-generator/actions/runs/5730559134/job/15529575715?pr=158

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

[booniepepper]

Cancelling in favor of https://github.com/openfga/sdk-generator/pull/163

Actually I guess it's fine to still do this, although it's no longer needed to fix workflows