fix: correct time_bucket_range code example.

[billy-the-fish]

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Fixes #[insert issue link, if any]

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[github-actions]

Allow 10 minutes from last push for the staging site to build. If the link doesn't work, try using incognito mode instead. For internal reviewers, check web-documentation repo actions for staging build status. Link to build for this PR: http://docs-dev.timescale.com/docs-3237-feedback-page-use-timescalelatesthyperfunctionscounter-aggregationcounter-aggs

[jkoria]

Looks good. Thanks!