docs: OpenTelemetry improvements updates

[evansims]

Description

This PR includes:

• Documentation updates to cover the improvements released in SDK v0.7.0 and v0.7.1.
• Updates to .openapi-generator/FILES and VERSION.txt to reflect the latest SDK Generator output

References

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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.16%. Comparing base (9e36918) to head (7083176).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #126 +/- ## ======================================= Coverage 69.16% 69.16% ======================================= Files 121 121 Lines 9982 9982 ======================================= Hits 6904 6904 Misses 3078 3078 ```

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