chore: bump autoscaling API version in OpenFGA HPA

[jon-whit]

Description

Update autoscaling API reference in OpenFGA HPA template and bump up to the latest version of OpenFGA.

References

Closes https://github.com/openfga/helm-charts/issues/65

Review Checklist

• [ ] 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]
• [ ] 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

[jon-whit]

Needs to be rebased after #63 is merged.