…use ibis UDF method (#277)

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Follow-up to https://togithub.com/googleapis/python-bigquery-dataframes/pull/53#discussion_r1427224630
🦕

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Fixes #<issue_number_goes_here> 🦕

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Fixes b/263399076 🦕

Updates the link to the client library reference docs page. The page doesn't exist yet but will be added in a future CL, and mentioned in the TOC from #378.

…e in the client (#387)

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Fixes internal issue 309699263 🦕

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Fixes internal #325083413 🦕

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