fix: python check call snippets

[julianolm]

Description

This is not python

Dict keys must be inside quotes and field atribution must use colon (instead of equal)

References

https://openfga.dev/docs/getting-started/perform-check

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

[linux-foundation-easycla]

• ✅login: julianolm / (76d489e)

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[rhamzeh]

Thanks @julianolm !