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Fixes #<issue_number_goes_here> 🦕

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Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

PR created by the Librarian CLI to initialize a release. Merging this PR
will auto trigger a release.

Librarian Version: v0.7.0
Language Image:
us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:c8612d3fffb3f6a32353b2d1abd16b61e87811866f7ec9d65b59b02eb452a620
<details><summary>google-cloud-bigquery: 3.40.0</summary>

##
[3.40.0](googleapis/python-bigquery@v3.39.0...v3.40.0)
(2026-01-08)

### Features

* support load_table and list_rows with picosecond timestamp (#2351)
([46764a59](googleapis/python-bigquery@46764a59))

* support timestamp_precision in table schema (#2333)
([8d5785ae](googleapis/python-bigquery@8d5785ae))

</details>